"Tue, 17 Feb 1970 14:12:15"

Convert date and time to unixtime.

4111935

Another datetime format string at UTC

YYYYMMDD
19700217

Only TIME
14:12:15

General datetime
1970-02-17 14:12:15Z

For Database
1970-02-17 14:12:15

For HTTP1.1
Tue, 17 Feb 1970 14:12:15 GMT

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