"Mon, 12 Jan 1970 19:40:15"

Convert date and time to unixtime.

1021215

Another datetime format string at UTC

YYYYMMDD
19700112

Only TIME
19:40:15

General datetime
1970-01-12 19:40:15Z

For Database
1970-01-12 19:40:15

For HTTP1.1
Mon, 12 Jan 1970 19:40:15 GMT

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