diff --git a/git_time_tracker/__init__.py b/git_time_tracker/__init__.py
index ece2e8a..ac47b11 100644
--- a/git_time_tracker/__init__.py
+++ b/git_time_tracker/__init__.py
@@ -39,7 +39,7 @@ from .data import (
     WorkSample,
 )
 from .format import cli, icalendar
-from .source import git_repo
+from .source import git_repo, csv_file
 
 logger = logging.getLogger(__name__)
 
@@ -94,6 +94,15 @@ def parse_arguments():
         nargs='+',
         type=Path,
         dest='repositories',
+        default=[],
+    )
+    parser.add_argument(
+        '--csv-file',
+        action='extend',
+        nargs='+',
+        type=Path,
+        dest='csv_files',
+        default=[],
     )
     parser.add_argument(
         '--filter',
@@ -113,31 +122,52 @@ def parse_arguments():
     )
     return parser.parse_args()
 
+def load_samples(args):
+    shared_time_stamps_set: set[WorkSample] = set()
+
+    # Git repositories
+    for repo_path in args.repositories:
+        logger.warning('Determine commits from %s', repo_path)
+        shared_time_stamps_set |= set(
+            git_repo.iterate_samples_from_git_repository(repo_path),
+        )
+        del repo_path
+
+    # CSV Files
+    for csv_path in args.csv_files:
+        logger.warning('Load samples from %s', csv_path)
+        shared_time_stamps_set |= set(
+            csv_file.iterate_samples_from_csv_file(csv_path),
+        )
+        del csv_path
+
+
+    return shared_time_stamps_set
 
 def main():
     logging.basicConfig()
 
     args = parse_arguments()
 
-    shared_time_stamps_set: set[WorkSample] = set()
-    for repo_path in args.repositories:
-        logger.warning('Visit %s', repo_path)
-        shared_time_stamps_set |= set(
-            git_repo.iterate_samples_from_git_repository(repo_path),
-        )
+    # Determine samples
+    shared_time_stamps_set = load_samples(args)
 
+    # Sort samples
     shared_time_stamps = sorted(shared_time_stamps_set, key=lambda s: s.end_at)
     del shared_time_stamps_set
 
+    # Filter samples
     sample_filter = args.sample_filter
     if len(sample_filter) != 0:
         logger.warning('Filtering %s samples', len(shared_time_stamps))
         shared_time_stamps = filter_samples(shared_time_stamps, sample_filter)
         logger.warning('Filtered down to %s samples', len(shared_time_stamps))
 
+    # Heuristic samples
     logger.warning('Realizing %s samples', len(shared_time_stamps))
     shared_time_stamps = list(heuristically_realize_samples(shared_time_stamps))
 
+    # Output format
     if args.format_mode == 'cli_report':
         for t in cli.generate_report(shared_time_stamps):
             sys.stdout.write(t)
diff --git a/git_time_tracker/format/icalendar.py b/git_time_tracker/format/icalendar.py
index 8d1e265..ccfab78 100644
--- a/git_time_tracker/format/icalendar.py
+++ b/git_time_tracker/format/icalendar.py
@@ -9,15 +9,19 @@ HOUR = datetime.timedelta(hours=1)
 MINUTE = datetime.timedelta(minutes=1)
 
 
-def create_title(sample: RealizedWorkSample) -> str:
+def create_title(sample: RealizedWorkSample) -> tuple[str,str]:
     ls = []
+    desc = []
     for label_and_type in sample.labels:
         if label_and_type.startswith(HIDDEN_LABEL_PREFIX):
             continue
         if label_and_type.startswith('author:'):
             continue
-        ls.append(label_and_type)
-    return ' '.join(ls)
+        if len(ls) == 0:
+            ls.append(label_and_type.split(':')[1])
+        else:
+            desc.append(label_and_type)
+    return ' '.join(ls), '\n'.join(desc)
 
 
 def generate_calendar(
@@ -30,9 +34,7 @@ def generate_calendar(
     cal.add('version', '2.0')
 
     for sample in samples:
-        title = create_title(sample)
-
-        description = ''
+        title, description = create_title(sample)
 
         # Create event
         event = icalendar.Event()
diff --git a/requirements.txt b/requirements.txt
index 64b1ada..dacab06 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
 GitPython
+icalendar