"Sat, 31 Jan 1970 19:40:54"

Convert date and time to unixtime.

2662854

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
19:40:54

General datetime
1970-01-31 19:40:54Z

For Database
1970-01-31 19:40:54

For HTTP1.1
Sat, 31 Jan 1970 19:40:54 GMT

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