"Sun, 04 Jan 1970 21:10:52"

Convert date and time to unixtime.

335452

Another datetime format string at UTC

YYYYMMDD
19700104

Only TIME
21:10:52

General datetime
1970-01-04 21:10:52Z

For Database
1970-01-04 21:10:52

For HTTP1.1
Sun, 04 Jan 1970 21:10:52 GMT

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