"Sun, 11 Jan 1970 15:12:37"

Convert date and time to unixtime.

918757

Another datetime format string at UTC

YYYYMMDD
19700111

Only TIME
15:12:37

General datetime
1970-01-11 15:12:37Z

For Database
1970-01-11 15:12:37

For HTTP1.1
Sun, 11 Jan 1970 15:12:37 GMT

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