"Sun, 11 Jan 1970 23:38:39"

Convert date and time to unixtime.

949119

Another datetime format string at UTC

YYYYMMDD
19700111

Only TIME
23:38:39

General datetime
1970-01-11 23:38:39Z

For Database
1970-01-11 23:38:39

For HTTP1.1
Sun, 11 Jan 1970 23:38:39 GMT

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