"Tue, 20 Jan 1970 23:37:44"

Convert date and time to unixtime.

1726664

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
23:37:44

General datetime
1970-01-20 23:37:44Z

For Database
1970-01-20 23:37:44

For HTTP1.1
Tue, 20 Jan 1970 23:37:44 GMT

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