"Sat, 31 Jan 1970 18:15:57"

Convert date and time to unixtime.

2657757

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
18:15:57

General datetime
1970-01-31 18:15:57Z

For Database
1970-01-31 18:15:57

For HTTP1.1
Sat, 31 Jan 1970 18:15:57 GMT

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