"Sat, 03 Jan 1970 00:39:15"

Convert date and time to unixtime.

175155

Another datetime format string at UTC

YYYYMMDD
19700103

Only TIME
00:39:15

General datetime
1970-01-03 00:39:15Z

For Database
1970-01-03 00:39:15

For HTTP1.1
Sat, 03 Jan 1970 00:39:15 GMT

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