"Tue, 20 Jan 1970 00:20:41"

Convert date and time to unixtime.

1642841

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
00:20:41

General datetime
1970-01-20 00:20:41Z

For Database
1970-01-20 00:20:41

For HTTP1.1
Tue, 20 Jan 1970 00:20:41 GMT

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