"Tue, 20 Jan 1970 09:23:15"

Convert date and time to unixtime.

1675395

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
09:23:15

General datetime
1970-01-20 09:23:15Z

For Database
1970-01-20 09:23:15

For HTTP1.1
Tue, 20 Jan 1970 09:23:15 GMT

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