"Fri, 16 Jan 1970 12:03:21"

Convert date and time to unixtime.

1339401

Another datetime format string at UTC

YYYYMMDD
19700116

Only TIME
12:03:21

General datetime
1970-01-16 12:03:21Z

For Database
1970-01-16 12:03:21

For HTTP1.1
Fri, 16 Jan 1970 12:03:21 GMT

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