diff --git a/src/cli/commands/edit.rs b/src/cli/commands/edit.rs
index 89a0240..a8761f3 100644
--- a/src/cli/commands/edit.rs
+++ b/src/cli/commands/edit.rs
@@ -24,7 +24,9 @@ fn all_files() -> Result<Vec<LocalizedShard>, StreamdError> {
             let content = fs::read_to_string(path)?;
             let stream_file = parse_markdown_file(&file_name, &content);
 
-            if let Ok(shard) = localize_stream_file(&stream_file, &TaskConfiguration) {
+            if let Ok(shard) =
+                localize_stream_file(&stream_file, &TaskConfiguration, chrono_tz::UTC)
+            {
                 shards.push(shard);
             }
         }
diff --git a/src/cli/commands/timesheet.rs b/src/cli/commands/timesheet.rs
index fa7f923..a1c4a37 100644
--- a/src/cli/commands/timesheet.rs
+++ b/src/cli/commands/timesheet.rs
@@ -5,6 +5,7 @@ use std::path::Path;
 use chrono::Datelike;
 use chrono::NaiveDate;
 use chrono::Utc;
+use chrono_tz::Tz;
 use walkdir::WalkDir;
 
 use crate::config::Settings;
@@ -20,7 +21,7 @@ use crate::timesheet::{
     DayType, DayWarning, MonthReport, TimesheetReport,
 };
 
-fn load_all_shards(base_folder: &Path) -> Result<Vec<LocalizedShard>, StreamdError> {
+fn load_all_shards(base_folder: &Path, tz: Tz) -> Result<Vec<LocalizedShard>, StreamdError> {
     let mut shards = Vec::new();
 
     for entry in WalkDir::new(base_folder)
@@ -34,7 +35,8 @@ fn load_all_shards(base_folder: &Path) -> Result<Vec<LocalizedShard>, StreamdErr
             let content = fs::read_to_string(path)?;
             let stream_file = parse_markdown_file(&file_name, &content);
 
-            if let Ok(shard) = localize_stream_file(&stream_file, &BasicTimesheetConfiguration) {
+            if let Ok(shard) = localize_stream_file(&stream_file, &BasicTimesheetConfiguration, tz)
+            {
                 shards.push(shard);
             }
         }
@@ -321,6 +323,13 @@ pub fn run(decimal: bool, debug: bool) -> Result<(), StreamdError> {
     // Load repository configuration
     let repo_config = load_repository_config(base_folder)?;
 
+    // Parse timezone from config, defaulting to UTC
+    let tz: Tz = repo_config
+        .timezone
+        .as_deref()
+        .and_then(|s| s.parse().ok())
+        .unwrap_or(chrono_tz::UTC);
+
     // Check if timesheet is configured
     let timesheet_config = match repo_config.timesheet {
         Some(config) => config,
@@ -338,12 +347,14 @@ pub fn run(decimal: bool, debug: bool) -> Result<(), StreamdError> {
         }
     };
 
+    let now = Utc::now();
+
     // Load all markdown files and extract timesheets
-    let all_shards = load_all_shards(base_folder)?;
-    let timesheets = extract_timesheets(&all_shards, Utc::now())?;
+    let all_shards = load_all_shards(base_folder, tz)?;
+    let timesheets = extract_timesheets(&all_shards, now, tz)?;
 
     // Generate the report
-    let report = generate_report(&timesheets, &timesheet_config)?;
+    let report = generate_report(&timesheets, &timesheet_config, now, tz)?;
 
     if report.months.is_empty() {
         println!("No timesheet data found for the configured periods.");
diff --git a/src/cli/commands/todo.rs b/src/cli/commands/todo.rs
index fe8e870..17bfba2 100644
--- a/src/cli/commands/todo.rs
+++ b/src/cli/commands/todo.rs
@@ -26,7 +26,9 @@ fn all_files() -> Result<Vec<LocalizedShard>, StreamdError> {
             let content = fs::read_to_string(path)?;
             let stream_file = parse_markdown_file(&file_name, &content);
 
-            if let Ok(shard) = localize_stream_file(&stream_file, &TaskConfiguration) {
+            if let Ok(shard) =
+                localize_stream_file(&stream_file, &TaskConfiguration, chrono_tz::UTC)
+            {
                 shards.push(shard);
             }
         }
diff --git a/src/localize/datetime.rs b/src/localize/datetime.rs
index 87a2718..3ff90a2 100644
--- a/src/localize/datetime.rs
+++ b/src/localize/datetime.rs
@@ -1,4 +1,5 @@
-use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, Utc};
+use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, TimeZone, Utc};
+use chrono_tz::Tz;
 use once_cell::sync::Lazy;
 use regex::Regex;
 use std::path::Path;
@@ -17,15 +18,25 @@ static DATE_MARKER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\d{8}$").unwr
 /// Regex for validating time marker format (6 digits).
 static TIME_MARKER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\d{6}$").unwrap());
 
+/// Convert a NaiveDateTime to UTC via the given timezone.
+/// Falls back to the earliest local interpretation for ambiguous DST times.
+fn naive_to_utc(dt: NaiveDateTime, tz: Tz) -> Option<DateTime<Utc>> {
+    tz.from_local_datetime(&dt)
+        .single()
+        .or_else(|| tz.from_local_datetime(&dt).earliest())
+        .map(|dt| dt.with_timezone(&Utc))
+}
+
 /// Extract a datetime from a file name in the format YYYYMMDD-HHMMSS.
 ///
 /// The time component is optional and can be 4-6 digits (HHMM, HHMMS, or HHMMSS).
+/// The datetime is interpreted in the given timezone.
 ///
 /// # Examples
-/// - "20230101-123456 Some Text.md" -> DateTime for 2023-01-01 12:34:56
-/// - "20230101 Some Text.md" -> DateTime for 2023-01-01 00:00:00
+/// - "20230101-123456 Some Text.md" -> DateTime for 2023-01-01 12:34:56 in tz
+/// - "20230101 Some Text.md" -> DateTime for 2023-01-01 00:00:00 in tz
 /// - "invalid-file-name.md" -> None
-pub fn extract_datetime_from_file_name(file_name: &str) -> Option<DateTime<Utc>> {
+pub fn extract_datetime_from_file_name(file_name: &str, tz: Tz) -> Option<DateTime<Utc>> {
     let base_name = Path::new(file_name)
         .file_name()
         .and_then(|s| s.to_str())
@@ -48,20 +59,23 @@ pub fn extract_datetime_from_file_name(file_name: &str) -> Option<DateTime<Utc>>
 
     NaiveDateTime::parse_from_str(&datetime_str, "%Y%m%d %H:%M:%S")
         .ok()
-        .map(|dt| dt.and_utc())
+        .and_then(|dt| naive_to_utc(dt, tz))
+}
+
+/// Parse a 14-digit marker string as a NaiveDateTime without timezone conversion.
+fn parse_naive_datetime_from_marker(marker: &str) -> Option<NaiveDateTime> {
+    if !DATETIME_MARKER_REGEX.is_match(marker) {
+        return None;
+    }
+    NaiveDateTime::parse_from_str(marker, "%Y%m%d%H%M%S").ok()
 }
 
 /// Extract a datetime from a marker string in the exact format: YYYYMMDDHHMMSS.
 ///
+/// The datetime is interpreted in the given timezone.
 /// Returns the parsed datetime if the format matches and values are valid.
-pub fn extract_datetime_from_marker(marker: &str) -> Option<DateTime<Utc>> {
-    if !DATETIME_MARKER_REGEX.is_match(marker) {
-        return None;
-    }
-
-    NaiveDateTime::parse_from_str(marker, "%Y%m%d%H%M%S")
-        .ok()
-        .map(|dt| dt.and_utc())
+pub fn extract_datetime_from_marker(marker: &str, tz: Tz) -> Option<DateTime<Utc>> {
+    parse_naive_datetime_from_marker(marker).and_then(|dt| naive_to_utc(dt, tz))
 }
 
 /// Extract a date from a marker string in the exact format: YYYYMMDD.
@@ -90,6 +104,7 @@ pub fn extract_time_from_marker(marker: &str) -> Option<NaiveTime> {
 ///
 /// The function processes markers in reverse order, allowing later markers to override
 /// earlier ones. It combines date-only and time-only markers when both are present.
+/// All naive datetimes (from markers and the inherited fallback) are interpreted in `tz`.
 ///
 /// Rules:
 /// - If a full datetime marker (14 digits) is found, it sets both date and time
@@ -99,6 +114,7 @@ pub fn extract_time_from_marker(marker: &str) -> Option<NaiveTime> {
 pub fn extract_datetime_from_marker_list(
     markers: &[String],
     inherited_datetime: DateTime<Utc>,
+    tz: Tz,
 ) -> DateTime<Utc> {
     let mut shard_time: Option<NaiveTime> = None;
     let mut shard_date: Option<NaiveDate> = None;
@@ -111,34 +127,39 @@ pub fn extract_datetime_from_marker_list(
         if let Some(date) = extract_date_from_marker(marker) {
             shard_date = Some(date);
         }
-        if let Some(datetime) = extract_datetime_from_marker(marker) {
-            shard_date = Some(datetime.naive_utc().date());
-            shard_time = Some(datetime.naive_utc().time());
+        if let Some(naive_dt) = parse_naive_datetime_from_marker(marker) {
+            shard_date = Some(naive_dt.date());
+            shard_time = Some(naive_dt.time());
         }
     }
 
+    // Interpret the inherited datetime in the configured timezone for fallback values
+    let inherited_local = inherited_datetime.with_timezone(&tz).naive_local();
+
     // Combine date and time, applying defaults as needed
-    let final_date = shard_date.unwrap_or_else(|| inherited_datetime.naive_utc().date());
+    let final_date = shard_date.unwrap_or_else(|| inherited_local.date());
     let final_time = match (shard_date, shard_time) {
         // If we have a date but no time, use midnight
         (Some(_), None) => NaiveTime::from_hms_opt(0, 0, 0).unwrap(),
         // Otherwise use the shard time or inherit
-        _ => shard_time.unwrap_or_else(|| inherited_datetime.naive_utc().time()),
+        _ => shard_time.unwrap_or_else(|| inherited_local.time()),
     };
 
-    NaiveDateTime::new(final_date, final_time).and_utc()
+    let naive = NaiveDateTime::new(final_date, final_time);
+    naive_to_utc(naive, tz).unwrap_or_else(|| inherited_datetime)
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
     use chrono::TimeZone;
+    use chrono_tz::UTC;
 
     #[test]
     fn test_extract_date_from_file_name_valid() {
         let file_name = "20230101-123456 Some Text.md";
         assert_eq!(
-            extract_datetime_from_file_name(file_name),
+            extract_datetime_from_file_name(file_name, UTC),
             Some(Utc.with_ymd_and_hms(2023, 1, 1, 12, 34, 56).unwrap())
         );
     }
@@ -146,14 +167,14 @@ mod tests {
     #[test]
     fn test_extract_date_from_file_name_invalid() {
         let file_name = "invalid-file-name.md";
-        assert_eq!(extract_datetime_from_file_name(file_name), None);
+        assert_eq!(extract_datetime_from_file_name(file_name, UTC), None);
     }
 
     #[test]
     fn test_extract_date_from_file_name_without_time() {
         let file_name = "20230101 Some Text.md";
         assert_eq!(
-            extract_datetime_from_file_name(file_name),
+            extract_datetime_from_file_name(file_name, UTC),
             Some(Utc.with_ymd_and_hms(2023, 1, 1, 0, 0, 0).unwrap())
         );
     }
@@ -162,7 +183,7 @@ mod tests {
     fn test_extract_date_from_file_name_short_time() {
         let file_name = "20230101-1234 Some Text.md";
         assert_eq!(
-            extract_datetime_from_file_name(file_name),
+            extract_datetime_from_file_name(file_name, UTC),
             Some(Utc.with_ymd_and_hms(2023, 1, 1, 12, 34, 0).unwrap())
         );
     }
@@ -170,41 +191,61 @@ mod tests {
     #[test]
     fn test_extract_date_from_file_name_empty_string() {
         let file_name = "";
-        assert_eq!(extract_datetime_from_file_name(file_name), None);
+        assert_eq!(extract_datetime_from_file_name(file_name, UTC), None);
     }
 
     #[test]
     fn test_extract_date_from_file_name_with_full_path() {
         let file_name = "/path/to/20230101-123456 Some Text.md";
         assert_eq!(
-            extract_datetime_from_file_name(file_name),
+            extract_datetime_from_file_name(file_name, UTC),
             Some(Utc.with_ymd_and_hms(2023, 1, 1, 12, 34, 56).unwrap())
         );
     }
 
+    #[test]
+    fn test_extract_date_from_file_name_with_timezone_offset() {
+        // Europe/Berlin is UTC+1 in January (CET)
+        let file_name = "20230101-120000 Some Text.md";
+        assert_eq!(
+            extract_datetime_from_file_name(file_name, chrono_tz::Europe::Berlin),
+            Some(Utc.with_ymd_and_hms(2023, 1, 1, 11, 0, 0).unwrap())
+        );
+    }
+
     #[test]
     fn test_extract_datetime_from_marker_valid() {
         let marker = "20250101150000";
         assert_eq!(
-            extract_datetime_from_marker(marker),
+            extract_datetime_from_marker(marker, UTC),
             Some(Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap())
         );
     }
 
+    #[test]
+    fn test_extract_datetime_from_marker_with_timezone_offset() {
+        // Europe/Berlin is UTC+1 in January (CET)
+        let marker = "20250101150000";
+        assert_eq!(
+            extract_datetime_from_marker(marker, chrono_tz::Europe::Berlin),
+            Some(Utc.with_ymd_and_hms(2025, 1, 1, 14, 0, 0).unwrap())
+        );
+    }
+
     #[test]
     fn test_extract_datetime_from_marker_invalid_format() {
-        assert_eq!(extract_datetime_from_marker("2025010115000"), None); // too short
-        assert_eq!(extract_datetime_from_marker("202501011500000"), None); // too long
-        assert_eq!(extract_datetime_from_marker("2025-01-01T150000"), None); // separators
-        assert_eq!(extract_datetime_from_marker("2025010115000a"), None); // non-digit
-        assert_eq!(extract_datetime_from_marker(""), None);
+        assert_eq!(extract_datetime_from_marker("2025010115000", UTC), None); // too short
+        assert_eq!(extract_datetime_from_marker("202501011500000", UTC), None); // too long
+        assert_eq!(extract_datetime_from_marker("2025-01-01T150000", UTC), None); // separators
+        assert_eq!(extract_datetime_from_marker("2025010115000a", UTC), None); // non-digit
+        assert_eq!(extract_datetime_from_marker("", UTC), None);
     }
 
     #[test]
     fn test_extract_datetime_from_marker_invalid_values() {
-        assert_eq!(extract_datetime_from_marker("20250230120000"), None); // Feb 30
-        assert_eq!(extract_datetime_from_marker("20250101126000"), None); // minute 60
-        assert_eq!(extract_datetime_from_marker("20250101240000"), None); // hour 24
+        assert_eq!(extract_datetime_from_marker("20250230120000", UTC), None); // Feb 30
+        assert_eq!(extract_datetime_from_marker("20250101126000", UTC), None); // minute 60
+        assert_eq!(extract_datetime_from_marker("20250101240000", UTC), None); // hour 24
     }
 
     #[test]
@@ -260,7 +301,10 @@ mod tests {
     #[test]
     fn test_no_markers_inherits_datetime() {
         let inherited = Utc.with_ymd_and_hms(2025, 1, 2, 3, 4, 5).unwrap();
-        assert_eq!(extract_datetime_from_marker_list(&[], inherited), inherited);
+        assert_eq!(
+            extract_datetime_from_marker_list(&[], inherited, UTC),
+            inherited
+        );
     }
 
     #[test]
@@ -273,7 +317,7 @@ mod tests {
             "1234567".to_string(),
         ];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             inherited
         );
     }
@@ -283,7 +327,7 @@ mod tests {
         let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
         let markers = vec!["20250101".to_string()];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 1, 1, 0, 0, 0).unwrap()
         );
     }
@@ -293,7 +337,7 @@ mod tests {
         let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
         let markers = vec!["150000".to_string()];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 6, 7, 15, 0, 0).unwrap()
         );
     }
@@ -303,7 +347,7 @@ mod tests {
         let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
         let markers = vec!["20250101150000".to_string()];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
         );
     }
@@ -313,7 +357,7 @@ mod tests {
         let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
         let markers = vec!["20250101".to_string(), "150000".to_string()];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
         );
     }
@@ -328,7 +372,7 @@ mod tests {
             "160000".to_string(),
         ];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
         );
     }
@@ -343,7 +387,7 @@ mod tests {
         ];
         // The first date (20250101) and first time (150000) should win over the later combined datetime
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
         );
     }
@@ -358,8 +402,19 @@ mod tests {
             "150000".to_string(),   // valid
         ];
         assert_eq!(
-            extract_datetime_from_marker_list(&markers, inherited),
+            extract_datetime_from_marker_list(&markers, inherited, UTC),
             Utc.with_ymd_and_hms(2025, 1, 1, 15, 0, 0).unwrap()
         );
     }
+
+    #[test]
+    fn test_marker_list_with_timezone_offset() {
+        // Europe/Berlin is UTC+2 in summer (CEST)
+        let inherited = Utc.with_ymd_and_hms(2025, 6, 7, 8, 9, 10).unwrap();
+        let markers = vec!["150000".to_string()];
+        assert_eq!(
+            extract_datetime_from_marker_list(&markers, inherited, chrono_tz::Europe::Berlin),
+            Utc.with_ymd_and_hms(2025, 6, 7, 13, 0, 0).unwrap()
+        );
+    }
 }
diff --git a/src/localize/shard.rs b/src/localize/shard.rs
index 279b8c6..0badda5 100644
--- a/src/localize/shard.rs
+++ b/src/localize/shard.rs
@@ -1,4 +1,5 @@
 use chrono::{DateTime, Utc};
+use chrono_tz::Tz;
 use indexmap::{IndexMap, IndexSet};
 
 use crate::error::StreamdError;
@@ -17,12 +18,13 @@ pub fn localize_shard(
     config: &RepositoryConfiguration,
     propagated: &IndexMap<String, String>,
     moment: DateTime<Utc>,
+    tz: Tz,
 ) -> LocalizedShard {
     let mut position = propagated.clone();
     let mut private_position: IndexMap<String, String> = IndexMap::new();
 
     // Extract datetime from markers
-    let adjusted_moment = extract_datetime_from_marker_list(&shard.markers, moment);
+    let adjusted_moment = extract_datetime_from_marker_list(&shard.markers, moment, tz);
 
     // Convert markers to a set for if_with checking
     let marker_set: IndexSet<String> = shard.markers.iter().cloned().collect();
@@ -64,7 +66,7 @@ pub fn localize_shard(
     let children: Vec<LocalizedShard> = shard
         .children
         .iter()
-        .map(|child| localize_shard(child, config, &position, adjusted_moment))
+        .map(|child| localize_shard(child, config, &position, adjusted_moment, tz))
         .collect();
 
     // Merge private position into final position
@@ -84,11 +86,13 @@ pub fn localize_shard(
 /// Localize an entire stream file.
 ///
 /// Extracts the datetime from the file name and localizes the root shard.
+/// Timestamps in the file name and markers are interpreted in `tz`.
 pub fn localize_stream_file(
     stream_file: &StreamFile,
     config: &RepositoryConfiguration,
+    tz: Tz,
 ) -> Result<LocalizedShard, StreamdError> {
-    let shard_date = extract_datetime_from_file_name(&stream_file.file_name)
+    let shard_date = extract_datetime_from_file_name(&stream_file.file_name, tz)
         .ok_or_else(|| StreamdError::DateExtractionError(stream_file.file_name.clone()))?;
 
     let shard = stream_file
@@ -99,7 +103,13 @@ pub fn localize_stream_file(
     let mut initial_location = IndexMap::new();
     initial_location.insert("file".to_string(), stream_file.file_name.clone());
 
-    Ok(localize_shard(shard, config, &initial_location, shard_date))
+    Ok(localize_shard(
+        shard,
+        config,
+        &initial_location,
+        shard_date,
+        tz,
+    ))
 }
 
 #[cfg(test)]
@@ -107,6 +117,7 @@ mod tests {
     use super::*;
     use crate::models::{Dimension, Marker, MarkerPlacement};
     use chrono::TimeZone;
+    use chrono_tz::UTC;
 
     fn make_config() -> RepositoryConfiguration {
         RepositoryConfiguration::new()
@@ -149,7 +160,7 @@ mod tests {
         let stream_file = StreamFile::new("20250622-121000 Test File.md")
             .with_shard(Shard::new(1, 1).with_markers(vec!["Streamd".to_string()]));
 
-        let result = localize_stream_file(&stream_file, &config).unwrap();
+        let result = localize_stream_file(&stream_file, &config, UTC).unwrap();
 
         assert_eq!(
             result.moment,
@@ -170,7 +181,7 @@ mod tests {
             Shard::new(1, 1).with_markers(vec!["Timesheet".to_string(), "Streamd".to_string()]),
         );
 
-        let result = localize_stream_file(&stream_file, &config).unwrap();
+        let result = localize_stream_file(&stream_file, &config, UTC).unwrap();
 
         assert_eq!(
             result.moment,
@@ -202,7 +213,7 @@ mod tests {
         let stream_file = StreamFile::new("20260131-210000 Test File.md")
             .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
 
-        let result = localize_stream_file(&stream_file, &config).unwrap();
+        let result = localize_stream_file(&stream_file, &config, UTC).unwrap();
 
         assert_eq!(result.location.get("project"), Some(&"b".to_string()));
     }
@@ -226,7 +237,7 @@ mod tests {
         let stream_file = StreamFile::new("20260131-210000 Test File.md")
             .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
 
-        let result = localize_stream_file(&stream_file, &config).unwrap();
+        let result = localize_stream_file(&stream_file, &config, UTC).unwrap();
 
         assert_eq!(result.location.get("project"), Some(&"a".to_string()));
     }
@@ -250,7 +261,7 @@ mod tests {
         let stream_file = StreamFile::new("20260131-210000 Test File.md")
             .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
 
-        let result = localize_stream_file(&stream_file, &config).unwrap();
+        let result = localize_stream_file(&stream_file, &config, UTC).unwrap();
 
         assert_eq!(result.location.get("label"), Some(&"b".to_string()));
     }
@@ -275,7 +286,7 @@ mod tests {
         let stream_file = StreamFile::new("20260131-210000 Test File.md")
             .with_shard(Shard::new(1, 1).with_markers(vec!["A".to_string(), "B".to_string()]));
 
-        let result = localize_stream_file(&stream_file, &config).unwrap();
+        let result = localize_stream_file(&stream_file, &config, UTC).unwrap();
 
         assert_eq!(result.location.get("label"), Some(&"a".to_string()));
     }
diff --git a/src/timesheet/extract.rs b/src/timesheet/extract.rs
index 304492e..0a6c8ff 100644
--- a/src/timesheet/extract.rs
+++ b/src/timesheet/extract.rs
@@ -1,4 +1,5 @@
 use chrono::{DateTime, Utc};
+use chrono_tz::Tz;
 use itertools::Itertools;
 
 use crate::error::StreamdError;
@@ -38,6 +39,7 @@ fn shards_to_timesheet_points(shards: &[LocalizedShard]) -> Vec<TimesheetPoint>
 fn aggregate_timecard_day(
     points: &[TimesheetPoint],
     now: DateTime<Utc>,
+    tz: Tz,
 ) -> Result<Option<Timesheet>, StreamdError> {
     if points.is_empty() {
         return Ok(None);
@@ -49,23 +51,23 @@ fn aggregate_timecard_day(
         pts
     };
 
-    let card_date = sorted_points[0].moment.date_naive();
+    let card_date = sorted_points[0].moment.with_timezone(&tz).date_naive();
     let mut is_sick_leave = false;
     let mut special_day_type: Option<SpecialDayType> = None;
 
     // State machine: starting in "break" mode (not working)
     let mut last_is_break = true;
-    let mut last_time = sorted_points[0].moment.time();
+    let mut last_time = sorted_points[0].moment.with_timezone(&tz).time();
     let mut timecards: Vec<Timecard> = Vec::new();
 
     for point in &sorted_points {
-        if point.moment.date_naive() != card_date {
+        if point.moment.with_timezone(&tz).date_naive() != card_date {
             return Err(StreamdError::TimesheetError(
                 "Dates of all given timesheet days should be consistent".to_string(),
             ));
         }
 
-        let point_time = point.moment.time();
+        let point_time = point.moment.with_timezone(&tz).time();
 
         match point.point_type {
             TimesheetPointType::Holiday => {
@@ -116,9 +118,10 @@ fn aggregate_timecard_day(
 
     // Check that we ended in break mode
     if !last_is_break {
-        if card_date == now.date_naive() {
+        let now_local = now.with_timezone(&tz);
+        if card_date == now_local.date_naive() {
             // No closing break yet for today — artificially close at now
-            timecards.push(Timecard::new(last_time, now.time()));
+            timecards.push(Timecard::new(last_time, now_local.time()));
         } else {
             return Err(StreamdError::TimesheetError(format!(
                 "Last Timecard of {} is not a break!",
@@ -144,6 +147,7 @@ fn aggregate_timecard_day(
 fn aggregate_timecards(
     points: &[TimesheetPoint],
     now: DateTime<Utc>,
+    tz: Tz,
 ) -> Result<Vec<Timesheet>, StreamdError> {
     let mut timesheets = Vec::new();
 
@@ -151,10 +155,13 @@ fn aggregate_timecards(
     let mut sorted_points = points.to_vec();
     sorted_points.sort_by_key(|p| p.moment);
 
-    // Group by date
-    for (_date, group) in &sorted_points.iter().chunk_by(|p| p.moment.date_naive()) {
+    // Group by local date in the configured timezone
+    for (_date, group) in &sorted_points
+        .iter()
+        .chunk_by(|p| p.moment.with_timezone(&tz).date_naive())
+    {
         let day_points: Vec<_> = group.cloned().collect();
-        if let Some(timesheet) = aggregate_timecard_day(&day_points, now)? {
+        if let Some(timesheet) = aggregate_timecard_day(&day_points, now, tz)? {
             timesheets.push(timesheet);
         }
     }
@@ -166,9 +173,10 @@ fn aggregate_timecards(
 pub fn extract_timesheets(
     shards: &[LocalizedShard],
     now: DateTime<Utc>,
+    tz: Tz,
 ) -> Result<Vec<Timesheet>, StreamdError> {
     let points = shards_to_timesheet_points(shards);
-    aggregate_timecards(&points, now)
+    aggregate_timecards(&points, now, tz)
 }
 
 #[cfg(test)]
@@ -177,6 +185,8 @@ mod tests {
     use chrono::{NaiveTime, TimeZone};
     use indexmap::IndexMap;
 
+    use chrono_tz::UTC;
+
     /// A fixed "now" in the past, so tests never match today.
     fn past_now() -> DateTime<Utc> {
         Utc.with_ymd_and_hms(2020, 1, 1, 0, 0, 0).unwrap()
@@ -217,7 +227,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert_eq!(result[0].date, day.date_naive());
@@ -270,7 +280,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert_eq!(result[0].timecards.len(), 3);
@@ -321,7 +331,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert_eq!(result[0].timecards.len(), 3);
@@ -355,7 +365,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 2);
         assert_eq!(result[0].date, day1.date_naive());
@@ -378,7 +388,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert_eq!(result[0].special_day_type, Some(SpecialDayType::Vacation));
@@ -401,7 +411,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert_eq!(result[0].special_day_type, Some(SpecialDayType::Holiday));
@@ -423,7 +433,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert_eq!(result[0].special_day_type, Some(SpecialDayType::Undertime));
@@ -450,7 +460,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert!(result[0].is_sick_leave);
@@ -473,7 +483,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert_eq!(result.len(), 1);
         assert!(result[0].is_sick_leave);
@@ -482,7 +492,7 @@ mod tests {
 
     #[test]
     fn test_empty_input() {
-        let result = extract_timesheets(&[], past_now()).unwrap();
+        let result = extract_timesheets(&[], past_now(), UTC).unwrap();
         assert!(result.is_empty());
     }
 
@@ -502,7 +512,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now());
+        let result = extract_timesheets(&shards, past_now(), UTC);
 
         assert!(result.is_err());
         let err = result.unwrap_err();
@@ -530,7 +540,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now());
+        let result = extract_timesheets(&shards, past_now(), UTC);
 
         assert!(result.is_err());
         let err = result.unwrap_err();
@@ -553,7 +563,7 @@ mod tests {
             ),
         ];
 
-        let result = extract_timesheets(&shards, past_now()).unwrap();
+        let result = extract_timesheets(&shards, past_now(), UTC).unwrap();
 
         assert!(result.is_empty());
     }
diff --git a/src/timesheet/generator.rs b/src/timesheet/generator.rs
index e6cde40..ede7898 100644
--- a/src/timesheet/generator.rs
+++ b/src/timesheet/generator.rs
@@ -2,7 +2,8 @@ use std::collections::HashMap;
 use std::fs;
 use std::path::Path;
 
-use chrono::{Datelike, NaiveDate, Weekday};
+use chrono::{DateTime, Datelike, NaiveDate, Utc, Weekday};
+use chrono_tz::Tz;
 
 use crate::error::StreamdError;
 use crate::models::{SpecialDayType, Timesheet};
@@ -115,6 +116,8 @@ fn calculate_actual_minutes(
 pub fn generate_report(
     timesheets: &[Timesheet],
     config: &TimesheetConfig,
+    now: DateTime<Utc>,
+    tz: Tz,
 ) -> Result<TimesheetReport, StreamdError> {
     if config.periods.is_empty() {
         return Ok(TimesheetReport::new());
@@ -128,8 +131,8 @@ pub fn generate_report(
     let earliest_period_start = config.periods.iter().map(|p| p.start).min().unwrap();
     let latest_period_end = config.periods.iter().map(|p| p.end).max().unwrap();
 
-    // Limit to today
-    let today = chrono::Local::now().date_naive();
+    // Limit to today in the configured timezone
+    let today = now.with_timezone(&tz).date_naive();
     let end_date = latest_period_end.min(today);
 
     // Group by month and generate reports
@@ -260,7 +263,13 @@ mod tests {
     use super::*;
     use crate::models::Timecard;
     use crate::timesheet::Period;
-    use chrono::NaiveTime;
+    use chrono::{NaiveTime, TimeZone};
+    use chrono_tz::UTC;
+
+    /// A "now" well past all test dates so report limits aren't hit.
+    fn future_now() -> DateTime<Utc> {
+        Utc.with_ymd_and_hms(2030, 1, 1, 0, 0, 0).unwrap()
+    }
 
     fn date(year: i32, month: u32, day: u32) -> NaiveDate {
         NaiveDate::from_ymd_opt(year, month, day).unwrap()
@@ -437,7 +446,7 @@ mod tests {
     #[test]
     fn test_generate_report_empty_config() {
         let config = TimesheetConfig { periods: vec![] };
-        let report = generate_report(&[], &config).unwrap();
+        let report = generate_report(&[], &config, future_now(), UTC).unwrap();
         assert!(report.months.is_empty());
     }
 
@@ -447,7 +456,7 @@ mod tests {
         let timesheets = vec![make_timesheet(date(2026, 3, 2), vec![(9, 0, 17, 0)])];
         let config = make_config(date(2026, 3, 2), date(2026, 3, 2), 40.0);
 
-        let report = generate_report(&timesheets, &config).unwrap();
+        let report = generate_report(&timesheets, &config, future_now(), UTC).unwrap();
 
         assert_eq!(report.months.len(), 1);
         assert_eq!(report.months[0].days.len(), 1);
@@ -466,7 +475,7 @@ mod tests {
         // March 2 is Monday, March 3 is Tuesday
         let config = make_config(date(2026, 3, 2), date(2026, 3, 3), 40.0);
 
-        let report = generate_report(&timesheets, &config).unwrap();
+        let report = generate_report(&timesheets, &config, future_now(), UTC).unwrap();
 
         assert_eq!(report.months[0].days.len(), 2);
 
@@ -484,7 +493,7 @@ mod tests {
         let timesheets = vec![make_timesheet(date(2026, 3, 2), vec![(9, 0, 17, 0)])];
         let config = make_config(date(2026, 3, 2), date(2026, 3, 8), 40.0);
 
-        let report = generate_report(&timesheets, &config).unwrap();
+        let report = generate_report(&timesheets, &config, future_now(), UTC).unwrap();
 
         // Should only include Mon-Fri (5 days), not Sat-Sun
         let days = &report.months[0].days;
@@ -503,7 +512,7 @@ mod tests {
         ];
         let config = make_config(date(2026, 3, 2), date(2026, 3, 8), 40.0);
 
-        let report = generate_report(&timesheets, &config).unwrap();
+        let report = generate_report(&timesheets, &config, future_now(), UTC).unwrap();
 
         // Should include Saturday
         let has_saturday = report.months[0]
@@ -526,7 +535,7 @@ mod tests {
         };
         let config = make_config(date(2026, 3, 2), date(2026, 3, 2), 40.0);
 
-        let report = generate_report(&[ts], &config).unwrap();
+        let report = generate_report(&[ts], &config, future_now(), UTC).unwrap();
 
         assert!(report.has_warnings());
         assert!(report.months[0].days[0].has_warnings());
@@ -541,7 +550,7 @@ mod tests {
         ];
         let config = make_config(date(2026, 3, 2), date(2026, 3, 3), 40.0);
 
-        let report = generate_report(&timesheets, &config).unwrap();
+        let report = generate_report(&timesheets, &config, future_now(), UTC).unwrap();
 
         // Balance should be +120 min (+2h: 18h actual - 16h expected)
         assert_eq!(report.cumulative_balance, 120);