"Tue, 06 Jan 1970 20:42:32"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
20:42:32
General datetime
1970-01-06 20:42:32Z
For Database
1970-01-06 20:42:32
For HTTP1.1
Tue, 06 Jan 1970 20:42:32 GMT