Listing of branch creation time?

I'm sure the git developers grow tired of working with addle-brained users, but I sometimes forget what the contents of a topic branch are, how old it is, etc. As to content, I can make better branch names, but I think it would be useful to be able to query git as to the creation time of all of my branches, perhaps sorted from newest to oldest.

Would it be reasonable to add an option to git-branch to do this?

Bill