I have a custom field "Time to Finish" in my custom content type in Drupal7. The "Time to Finish" is basically a timer of sorts. whenever the users click a flag (which is placed on nodes of that custom content type) the timer should start. The difficulty associated with this is that:

> 1. Every node of that content type has different Time to Finish
> 2. The timer should start on flag click (the flag is same on all node, "Start Flag")
> 3. Every user would have their own timer then depending on when they click on the Start Flag

The admin while creating the content **should** have the option to fill in the field "Time to Finish" and on flag click the timer should start. Any suggestions. Would really appreciate it.

Thanks 

PS: As of now "Time to Finish" is of type Date.