"Wed, 21 Jan 1970 15:05:40"

Convert date and time to unixtime.

1782340

Another datetime format string at UTC

YYYYMMDD
19700121

Only TIME
15:05:40

General datetime
1970-01-21 15:05:40Z

For Database
1970-01-21 15:05:40

For HTTP1.1
Wed, 21 Jan 1970 15:05:40 GMT

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