diff --git a/tools/date_to_timestamp.py b/tools/date_to_timestamp.py
new file mode 100644
index 0000000..577519c
--- /dev/null
+++ b/tools/date_to_timestamp.py
@@ -0,0 +1,7 @@
+from datetime import datetime, timezone
+
+
+def run(date_str: str) -> str:
+    """Converts a date string (YYYY-MM-DD) to a Unix timestamp."""
+    dt = datetime.strptime(date_str, "%Y-%m-%d").replace(tzinfo=timezone.utc)
+    return str(int(dt.timestamp()))