"Sat, 17 Jan 1970 18:27:31"

Convert date and time to unixtime.

1448851

Another datetime format string at UTC

YYYYMMDD
19700117

Only TIME
18:27:31

General datetime
1970-01-17 18:27:31Z

For Database
1970-01-17 18:27:31

For HTTP1.1
Sat, 17 Jan 1970 18:27:31 GMT

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