"Fri, 23 Jan 1970 21:46:33"

Convert date and time to unixtime.

1979193

Another datetime format string at UTC

YYYYMMDD
19700123

Only TIME
21:46:33

General datetime
1970-01-23 21:46:33Z

For Database
1970-01-23 21:46:33

For HTTP1.1
Fri, 23 Jan 1970 21:46:33 GMT

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