We are upgrading from a very old version of Jira. We tested the "then current" version a few years ago, but did not upgrade at that time.
At that time there was a gadget that looked pretty much exactly like this (or very close to it) where you could configure how many weeks in the past to show.
Here is a screen shot of what we have in our old version. 
It allows us to log time to future and past days very easily.
ex: log upcoming holiday or vacation time
Is this available and I just haven't found it?
Thanks!