"Tue, 20 Jan 1970 18:15:45"

Convert date and time to unixtime.

1707345

Another datetime format string at UTC

YYYYMMDD
19700120

Only TIME
18:15:45

General datetime
1970-01-20 18:15:45Z

For Database
1970-01-20 18:15:45

For HTTP1.1
Tue, 20 Jan 1970 18:15:45 GMT

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