"Mon, 19 Jan 1970 18:27:10"

Convert date and time to unixtime.

1621630

Another datetime format string at UTC

YYYYMMDD
19700119

Only TIME
18:27:10

General datetime
1970-01-19 18:27:10Z

For Database
1970-01-19 18:27:10

For HTTP1.1
Mon, 19 Jan 1970 18:27:10 GMT

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