Forum:How to make it count?

How can I make the source count how many days ago it is, for example, I want it automatically to change how many days ago is it from February 18, 2012? &mdash; [/wiki/User:Sam_Wang S a m ] [/wiki/Message_Wall:Sam_Wang W a n g ] 05:26, February 19, 2012 (UTC)
 * Check out w:c:dev:countdown. That will do what you want.--
 * You are thinking about countdown, but I want it to count-up. How to make it count up? &mdash; [/wiki/User:Sam_Wang S a m ] [/wiki/Message_Wall:Sam_Wang W a n g ] 08:17, February 19, 2012 (UTC)
 * That script counts up too. If you set the time for some time that already passed it will display "t plus x days until y". You can customize it more to make it look nicer but that will do it.--