"Sat, 17 Jan 1970 04:35:38"

Convert date and time to unixtime.

1398938

Another datetime format string at UTC

YYYYMMDD
19700117

Only TIME
04:35:38

General datetime
1970-01-17 04:35:38Z

For Database
1970-01-17 04:35:38

For HTTP1.1
Sat, 17 Jan 1970 04:35:38 GMT

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