Unix timestamp

-42009321600

Fri 12 Oct 638 12:00:00 AM UTC

Coordinated Universal Time

Fri Oct 12 00:00:00 638 UTC

In your local timezone

0638-10-12T00:00:00+00:00

ISO 8601

Fri, 12 Oct 0638 00:00:00 +0000

RFC 2822