"Fri, 06 Feb 1970 12:54:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700206
Only TIME
12:54:36
General datetime
1970-02-06 12:54:36Z
For Database
1970-02-06 12:54:36
For HTTP1.1
Fri, 06 Feb 1970 12:54:36 GMT