"Sun, 11 Jan 1970 09:15:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
09:15:45
General datetime
1970-01-11 09:15:45Z
For Database
1970-01-11 09:15:45
For HTTP1.1
Sun, 11 Jan 1970 09:15:45 GMT