"Sun, 04 Jan 1970 19:40:42"

Convert date and time to unixtime.

330042

Another datetime format string at UTC

YYYYMMDD
19700104

Only TIME
19:40:42

General datetime
1970-01-04 19:40:42Z

For Database
1970-01-04 19:40:42

For HTTP1.1
Sun, 04 Jan 1970 19:40:42 GMT

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