"Tue, 20 Jan 1970 18:03:39"

Convert date and time to unixtime.

1706619

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
18:03:39

General datetime
1970-01-20 18:03:39Z

For Database
1970-01-20 18:03:39

For HTTP1.1
Tue, 20 Jan 1970 18:03:39 GMT

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