diff --git a/git_time_tracker/source/csv_file.py b/git_time_tracker/source/csv_file.py
index 6caff8e..29acb63 100644
--- a/git_time_tracker/source/csv_file.py
+++ b/git_time_tracker/source/csv_file.py
@@ -1,5 +1,6 @@
 import argparse
 from collections.abc import Iterator
+from decimal import Decimal
 import datetime
 import urllib.parse
 from pathlib import Path
@@ -17,6 +18,9 @@ def iterate_samples_from_dicts(rows: list[dict]) -> Iterator[WorkSample]:
         possible_time_keys = [
             k for k, v in event_data.items() if isinstance(v, datetime.date)
         ]
+        possible_duration_keys = [
+            k for k, v in event_data.items() if isinstance(v, Decimal) and 'duration_seconds' in k
+        ]
         possible_name_keys = [k for k, v in event_data.items() if isinstance(v, str)]
         possible_image_keys = [
             k for k, v in event_data.items() if isinstance(v, urllib.parse.ParseResult)
@@ -38,6 +42,15 @@ def iterate_samples_from_dicts(rows: list[dict]) -> Iterator[WorkSample]:
         if date is None:
             continue
 
+        if len(possible_duration_keys) > 0:
+            start_at = date
+            seconds = event_data[possible_duration_keys[0]]
+            end_at = date + datetime.timedelta(seconds = float(seconds))
+            del seconds
+        else:
+            start_at = None
+            end_at = date
+
         title = ': '.join(event_data[k] for k in possible_name_keys[:max_title_parts])
         description = '\n\n'.join(event_data[k] for k in possible_name_keys[max_title_parts:])
 
@@ -46,8 +59,8 @@ def iterate_samples_from_dicts(rows: list[dict]) -> Iterator[WorkSample]:
         # Create event
         yield WorkSample(
             labels=tuple(labels),
-            start_at=None,
-            end_at=date,
+            start_at=start_at,
+            end_at=end_at,
         )
 
         del event_data