"Sat, 31 Jan 1970 00:20:00"

Convert date and time to unixtime.

2593200

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
00:20:00

General datetime
1970-01-31 00:20:00Z

For Database
1970-01-31 00:20:00

For HTTP1.1
Sat, 31 Jan 1970 00:20:00 GMT

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