"Tue, 20 Jan 1970 07:51:20"

Convert date and time to unixtime.

1669880

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
07:51:20

General datetime
1970-01-20 07:51:20Z

For Database
1970-01-20 07:51:20

For HTTP1.1
Tue, 20 Jan 1970 07:51:20 GMT

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