"Tue, 27 Jan 1970 14:46:21"

Convert date and time to unixtime.

2299581

Another datetime format string at UTC

YYYYMMDD
19700127

Only TIME
14:46:21

General datetime
1970-01-27 14:46:21Z

For Database
1970-01-27 14:46:21

For HTTP1.1
Tue, 27 Jan 1970 14:46:21 GMT

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