datetime Summary
Python datetime provides date arithmetic, formatting, timezone handling, and comparison. Use zoneinfo for IANA zones, dateutil for flexible parsing, pandas for bulk operations, and ISO 8601 for serialisation.
Python
Beginner
3 min read
Python datetime Summary
Example
from datetime import datetime, timezone, timedelta
from zoneinfo import ZoneInfo
now_utc = datetime.now(tz=timezone.utc)
tomorrow = now_utc + timedelta(days=1)
ny_time = now_utc.astimezone(ZoneInfo("America/New_York"))
iso_str = now_utc.isoformat()
back = datetime.fromisoformat(iso_str) Pro Tip
Store UTC, display local. Parse at boundaries, use timedelta inside. Serialise as ISO 8601.