"Sat, 10 Jan 1970 00:20:30"

Convert date and time to unixtime.

778830

Another datetime format string at UTC

YYYYMMDD
19700110

Only TIME
00:20:30

General datetime
1970-01-10 00:20:30Z

For Database
1970-01-10 00:20:30

For HTTP1.1
Sat, 10 Jan 1970 00:20:30 GMT

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