"Thu, 12 Feb 1970 21:42:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
21:42:12
General datetime
1970-02-12 21:42:12Z
For Database
1970-02-12 21:42:12
For HTTP1.1
Thu, 12 Feb 1970 21:42:12 GMT