"Tue, 20 Jan 1970 20:35:51"

Convert date and time to unixtime.

1715751

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
20:35:51

General datetime
1970-01-20 20:35:51Z

For Database
1970-01-20 20:35:51

For HTTP1.1
Tue, 20 Jan 1970 20:35:51 GMT

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