"Thu, 22 Jan 1970 18:11:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700122
Only TIME
18:11:33
General datetime
1970-01-22 18:11:33Z
For Database
1970-01-22 18:11:33
For HTTP1.1
Thu, 22 Jan 1970 18:11:33 GMT