"Sun, 11 Jan 1970 18:16:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
18:16:06
General datetime
1970-01-11 18:16:06Z
For Database
1970-01-11 18:16:06
For HTTP1.1
Sun, 11 Jan 1970 18:16:06 GMT