"Fri, 02 Jan 1970 01:20:31"

Convert date and time to unixtime.

91231

Another datetime format string at UTC

YYYYMMDD
19700102

Only TIME
01:20:31

General datetime
1970-01-02 01:20:31Z

For Database
1970-01-02 01:20:31

For HTTP1.1
Fri, 02 Jan 1970 01:20:31 GMT

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