"Sat, 17 Jan 1970 20:42:23"

Convert date and time to unixtime.

1456943

Another datetime format string at UTC

YYYYMMDD
19700117

Only TIME
20:42:23

General datetime
1970-01-17 20:42:23Z

For Database
1970-01-17 20:42:23

For HTTP1.1
Sat, 17 Jan 1970 20:42:23 GMT


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