"Sat, 10 Jan 1970 21:42:17"

Convert date and time to unixtime.

855737

Another datetime format string at UTC

YYYYMMDD
19700110

Only TIME
21:42:17

General datetime
1970-01-10 21:42:17Z

For Database
1970-01-10 21:42:17

For HTTP1.1
Sat, 10 Jan 1970 21:42:17 GMT

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