"Sun, 11 Jan 1970 14:45:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
14:45:09
General datetime
1970-01-11 14:45:09Z
For Database
1970-01-11 14:45:09
For HTTP1.1
Sun, 11 Jan 1970 14:45:09 GMT