update db str

backend/utils.py

@@ -0,0 +1,18 @@
+"""Utility functions"""
+from datetime import datetime, timezone, timedelta
+
+
+def utc_to_ist(utc_datetime: datetime) -> datetime:
+    """Convert UTC datetime to IST (Indian Standard Time)"""
+    ist_offset = timezone(timedelta(hours=5, minutes=30))
+    return utc_datetime.replace(tzinfo=timezone.utc).astimezone(ist_offset)
+
+
+def format_ist_timestamp(utc_iso_string: str) -> str:
+    """Convert UTC ISO string to IST ISO string"""
+    try:
+        utc_dt = datetime.fromisoformat(utc_iso_string.replace('Z', '+00:00'))
+        ist_dt = utc_to_ist(utc_dt)
+        return ist_dt.isoformat()
+    except Exception as e:
+        raise ValueError(f"Invalid datetime format: {str(e)}")