"Sun, 15 Feb 1970 04:42:32"

Convert date and time to unixtime.

3904952

Another datetime format string at UTC

YYYYMMDD
19700215

Only TIME
04:42:32

General datetime
1970-02-15 04:42:32Z

For Database
1970-02-15 04:42:32

For HTTP1.1
Sun, 15 Feb 1970 04:42:32 GMT

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