"Thu, 19 Feb 1970 21:42:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700219
Only TIME
21:42:06
General datetime
1970-02-19 21:42:06Z
For Database
1970-02-19 21:42:06
For HTTP1.1
Thu, 19 Feb 1970 21:42:06 GMT