"Sun, 04 Jan 1970 03:42:21"

Convert date and time to unixtime.

272541

Another datetime format string at UTC

YYYYMMDD
19700104

Only TIME
03:42:21

General datetime
1970-01-04 03:42:21Z

For Database
1970-01-04 03:42:21

For HTTP1.1
Sun, 04 Jan 1970 03:42:21 GMT

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