Sorry I wasn't checking for the last few days
I assume you meant how to set the clock (Otherwise refer to ndnhc's reply)
All you need to do is change the date time stamp
I tried that but it doesn't shows the correct time.
It's based on a timezone just like the Bitcointalk forums
I get -4 hours unless I adjust the clock do that you should be able to set it to whatever time you want.
http://seanja.com/secret/countdown/gif.php?time=23:00
http://seanja.com/secret/countdown/gif.php?time=23:15
http://seanja.com/secret/countdown/gif.php?time=2015-04-09-23:15
http://seanja.com/secret/countdown/gif.php?time=2015-04-10-23:00
Etc
Yeah, I have to play with it, trying different times to get it right.
But for now this will have to do. Thanks to everyone, for their help
I am marking this thread as solved and closing it now.