Unix timestamp

-22027939200

Fri 18 Dec 1271 12:00:00 AM UTC

Coordinated Universal Time

Fri Dec 18 00:00:00 1271 UTC

In your local timezone

1271-12-18T00:00:00+00:00

ISO 8601

Fri, 18 Dec 1271 00:00:00 +0000

RFC 2822