"Tue, 27 Jan 1970 18:13:15"

Convert date and time to unixtime.

2311995

Another datetime format string at UTC

YYYYMMDD
19700127

Only TIME
18:13:15

General datetime
1970-01-27 18:13:15Z

For Database
1970-01-27 18:13:15

For HTTP1.1
Tue, 27 Jan 1970 18:13:15 GMT

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