"Thu, 22 Jan 1970 14:30:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700122
Only TIME
14:30:23
General datetime
1970-01-22 14:30:23Z
For Database
1970-01-22 14:30:23
For HTTP1.1
Thu, 22 Jan 1970 14:30:23 GMT