"Sun, 04 Jan 1970 02:28:51"

Convert date and time to unixtime.

268131

Another datetime format string at UTC

YYYYMMDD
19700104

Only TIME
02:28:51

General datetime
1970-01-04 02:28:51Z

For Database
1970-01-04 02:28:51

For HTTP1.1
Sun, 04 Jan 1970 02:28:51 GMT

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