diff --git a/.github/workflows/openairframes-daily-release.yaml b/.github/workflows/openairframes-daily-release.yaml
index c0787bb..ca9003d 100644
--- a/.github/workflows/openairframes-daily-release.yaml
+++ b/.github/workflows/openairframes-daily-release.yaml
@@ -2,7 +2,7 @@ name: openairframes-daily-release
 
 on:
   schedule:
-    # 6:00pm UTC every day - runs on default branch, triggers both
+    # 06:00 UTC every day - runs on default branch, triggers both
     - cron: "0 06 * * *"
   workflow_dispatch:
     inputs:
diff --git a/src/adsb/compress_adsb_to_aircraft_data.py b/src/adsb/compress_adsb_to_aircraft_data.py
index d32cb54..989dd2b 100644
--- a/src/adsb/compress_adsb_to_aircraft_data.py
+++ b/src/adsb/compress_adsb_to_aircraft_data.py
@@ -141,7 +141,7 @@ def load_parquet_part(part_id: int, date: str) -> pl.DataFrame:
     """Load a single parquet part file for a date.
     
     Args:
-        part_id: Part ID (e.g., 1, 2, 3)
+        part_id: Part ID (0-indexed, e.g. 0, 1, 2, 3)
         date: Date string in YYYY-MM-DD format
     
     Returns:
diff --git a/src/adsb/process_icao_chunk.py b/src/adsb/process_icao_chunk.py
index 7d01feb..938858b 100644
--- a/src/adsb/process_icao_chunk.py
+++ b/src/adsb/process_icao_chunk.py
@@ -116,7 +116,7 @@ from pathlib import Path
 
 def main():
     parser = argparse.ArgumentParser(description="Process a single archive part for a day")
-    parser.add_argument("--part-id", type=int, required=True, help="Part ID (1-indexed)")
+    parser.add_argument("--part-id", type=int, required=True, help="Part ID (0-indexed)")
     parser.add_argument("--date", type=str, required=True, help="Date in YYYY-MM-DD format")
     args = parser.parse_args()