"Sat, 10 Jan 1970 11:21:33"

Convert date and time to unixtime.

818493

Another datetime format string at UTC

YYYYMMDD
19700110

Only TIME
11:21:33

General datetime
1970-01-10 11:21:33Z

For Database
1970-01-10 11:21:33

For HTTP1.1
Sat, 10 Jan 1970 11:21:33 GMT

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