"Fri, 09 Jan 1970 00:20:20"

Convert date and time to unixtime.

692420

Another datetime format string at UTC

YYYYMMDD
19700109

Only TIME
00:20:20

General datetime
1970-01-09 00:20:20Z

For Database
1970-01-09 00:20:20

For HTTP1.1
Fri, 09 Jan 1970 00:20:20 GMT

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