"Sun, 22 Feb 1970 07:12:13"

Convert date and time to unixtime.

4518733

Another datetime format string at UTC

YYYYMMDD
19700222

Only TIME
07:12:13

General datetime
1970-02-22 07:12:13Z

For Database
1970-02-22 07:12:13

For HTTP1.1
Sun, 22 Feb 1970 07:12:13 GMT

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