Redmine

I would like to have the end date of an issue to be dynamic and dependent on how long it takes to work on the issue.

Maybe an example would be good.

I have an issue which I suspect will take 5 days to resolve. I create it on the first of the month. I work on it full time on the first and second. Thus the end date is marked as the 5th on both the first and second day. Now, a crisis happens and no work gets done on this issue on the 3rd and 4th. Now, I want the end date of the issue to automatically move to the 7th (7=5+2) of the month.

Of course, any issues dependent on this issue would have to move by two days as well.

Is that possible?

If so, how do I set it up?

If not, how easy would it be to create a plugin to make it do that?

Thanks.