"Tue, 27 Jan 1970 09:22:08"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
09:22:08
General datetime
1970-01-27 09:22:08Z
For Database
1970-01-27 09:22:08
For HTTP1.1
Tue, 27 Jan 1970 09:22:08 GMT