"Sun, 11 Jan 1970 04:39:04"

Convert date and time to unixtime.

880744

Another datetime format string at UTC

YYYYMMDD
19700111

Only TIME
04:39:04

General datetime
1970-01-11 04:39:04Z

For Database
1970-01-11 04:39:04

For HTTP1.1
Sun, 11 Jan 1970 04:39:04 GMT

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