@Richard_Sather - thanks for the mention here!
Hi @Tim_Washington - definitely understand the issue you’re having.
We have a feature that does this with 2 clicks per project.
And, eventually it’ll do it with zero clicks. 
How to access the feature after getting the free version of Supersana:
Super Actions > Super Date > “Project date range based on all tasks and subtasks in project”
As Richard said, this is one of several dozen things that Supersana does.
How to get and use 
Supersana for Asana for FREE forever:
- Add the extension: Go to Supersana.io/free and click the “Free Forever” license. This will allow you to use all PRO features for 2 weeks, and then when your trial is finished, it’ll let you choose 3 features to keep free forever.
- Authorize your Asana account: When you install it, it’ll ask for browser permissions — click Allow. Then it’ll ask for Asana permissions — click Allow (or whatever YES button is there).
- Choose your features: Watch the 4-min Supersana onboarding video. Then, turn ON the features you want and leave everything else off.
- Lastly, click on the puzzle piece at the top right of your browser (Chrome). Then click the “Pin” next to Supersana.
- The feature you are looking for is under Super Actions >> Super Date.
Now you can use the SuperDate feature with 2 clicks per project, and eventually it’ll be zero clicks! (You’ll be able to turn it on and it’ll just run for you in the background!)
You did it! Now you can click the Supersana logo at the top right and use any features you’d like.
IMPORTANT: It is IN BETA — so we KNOW it has bugs. For that reason, please be sure to test any particular feature on a test project before using it on a live project. 
Report a bug and we’ll usually fix it within 2-3 days.
FREE FOREVER DETAILS: After your trial, if you decide to keep PRO, you can get a lifetime single user or team-wide license for a one-time payment. Or, you can just keep your favorite 3 features free forever.