"Thu, 05 Feb 1970 18:13:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700205
Only TIME
18:13:20
General datetime
1970-02-05 18:13:20Z
For Database
1970-02-05 18:13:20
For HTTP1.1
Thu, 05 Feb 1970 18:13:20 GMT