"Wed, 21 Jan 1970 20:42:51"

Convert date and time to unixtime.

1802571

Another datetime format string at UTC

YYYYMMDD
19700121

Only TIME
20:42:51

General datetime
1970-01-21 20:42:51Z

For Database
1970-01-21 20:42:51

For HTTP1.1
Wed, 21 Jan 1970 20:42:51 GMT

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