"Thu, 19 Feb 1970 21:42:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700219
Only TIME
21:42:05
General datetime
1970-02-19 21:42:05Z
For Database
1970-02-19 21:42:05
For HTTP1.1
Thu, 19 Feb 1970 21:42:05 GMT