"Sat, 10 Jan 1970 11:45:40"

Convert date and time to unixtime.

819940

Another datetime format string at UTC

YYYYMMDD
19700110

Only TIME
11:45:40

General datetime
1970-01-10 11:45:40Z

For Database
1970-01-10 11:45:40

For HTTP1.1
Sat, 10 Jan 1970 11:45:40 GMT

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