Unix timestamp

-23611824000

Sat 09 Oct 1221 12:00:00 AM UTC

Coordinated Universal Time

Sat Oct 9 00:00:00 1221 UTC

In your local timezone

1221-10-09T00:00:00+00:00

ISO 8601

Sat, 09 Oct 1221 00:00:00 +0000

RFC 2822