By Fenrir.Jinjo 2013-11-23 06:34:56
I'm fairly certain the delve timer is created through the addon 'plasmon'.
Using Lua, you could easily create a custom timer for any event with its own icon, etc.. You can look at plasmon.lua if you want to get an idea how. You'd probably be able to get away with some fairly simple copy/paste manipulation if you wanted to do it yourself.
You can also just create a custom timer whenever you want using //timers create [name] [duration in seconds] up/down [optional? icon path]