"Thu, 22 Jan 1970 18:16:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700122
Only TIME
18:16:02
General datetime
1970-01-22 18:16:02Z
For Database
1970-01-22 18:16:02
For HTTP1.1
Thu, 22 Jan 1970 18:16:02 GMT