"Fri, 27 Feb 1970 19:40:56"

Convert date and time to unixtime.

4995656

Another datetime format string at UTC

YYYYMMDD
19700227

Only TIME
19:40:56

General datetime
1970-02-27 19:40:56Z

For Database
1970-02-27 19:40:56

For HTTP1.1
Fri, 27 Feb 1970 19:40:56 GMT

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