"Tue, 06 Jan 1970 23:30:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
23:30:37
General datetime
1970-01-06 23:30:37Z
For Database
1970-01-06 23:30:37
For HTTP1.1
Tue, 06 Jan 1970 23:30:37 GMT