"Sat, 31 Jan 1970 20:35:40"

Convert date and time to unixtime.

2666140

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
20:35:40

General datetime
1970-01-31 20:35:40Z

For Database
1970-01-31 20:35:40

For HTTP1.1
Sat, 31 Jan 1970 20:35:40 GMT

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