"Sun, 11 Jan 1970 19:42:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
19:42:14
General datetime
1970-01-11 19:42:14Z
For Database
1970-01-11 19:42:14
For HTTP1.1
Sun, 11 Jan 1970 19:42:14 GMT