"Tue, 06 Jan 1970 14:18:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
14:18:47
General datetime
1970-01-06 14:18:47Z
For Database
1970-01-06 14:18:47
For HTTP1.1
Tue, 06 Jan 1970 14:18:47 GMT