"Wed, 21 Jan 1970 20:35:44"

Convert date and time to unixtime.

1802144

Another datetime format string at UTC

YYYYMMDD
19700121

Only TIME
20:35:44

General datetime
1970-01-21 20:35:44Z

For Database
1970-01-21 20:35:44

For HTTP1.1
Wed, 21 Jan 1970 20:35:44 GMT

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