"Thu, 19 Feb 1970 18:16:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700219
Only TIME
18:16:15
General datetime
1970-02-19 18:16:15Z
For Database
1970-02-19 18:16:15
For HTTP1.1
Thu, 19 Feb 1970 18:16:15 GMT