"Sun, 11 Jan 1970 15:17:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
15:17:02
General datetime
1970-01-11 15:17:02Z
For Database
1970-01-11 15:17:02
For HTTP1.1
Sun, 11 Jan 1970 15:17:02 GMT