"Sat, 31 Jan 1970 12:54:44"

Convert date and time to unixtime.

2638484

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
12:54:44

General datetime
1970-01-31 12:54:44Z

For Database
1970-01-31 12:54:44

For HTTP1.1
Sat, 31 Jan 1970 12:54:44 GMT

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