"Tue, 06 Jan 1970 23:34:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
23:34:44
General datetime
1970-01-06 23:34:44Z
For Database
1970-01-06 23:34:44
For HTTP1.1
Tue, 06 Jan 1970 23:34:44 GMT