"Thu, 12 Feb 1970 19:40:40"

Convert date and time to unixtime.

3699640

Another datetime format string at UTC

YYYYMMDD
19700212

Only TIME
19:40:40

General datetime
1970-02-12 19:40:40Z

For Database
1970-02-12 19:40:40

For HTTP1.1
Thu, 12 Feb 1970 19:40:40 GMT

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