"Fri, 23 Jan 1970 21:48:40"

Convert date and time to unixtime.

1979320

Another datetime format string at UTC

YYYYMMDD
19700123

Only TIME
21:48:40

General datetime
1970-01-23 21:48:40Z

For Database
1970-01-23 21:48:40

For HTTP1.1
Fri, 23 Jan 1970 21:48:40 GMT


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