"Sun, 11 Jan 1970 18:26:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
18:26:33
General datetime
1970-01-11 18:26:33Z
For Database
1970-01-11 18:26:33
For HTTP1.1
Sun, 11 Jan 1970 18:26:33 GMT