Not sure if anyone will be interested in this, but I sure was, so figured I’d post it here.
I was pretty frustrated when I realized you can’t natively sort the timeline column by the end date. So… my workaround was to make a formula column, and set the formula to DAYS ({Calender#End}, TODAY())
This will result in giving you a numerical value that will correspond to the end of your timeline. Simply sort the formula column ascending or descending, and there ya go.