Tip! The main difference between the two options could be explained by this: Ascending based on a date will put the oldest date first, then go on to the most current and beyond date. So if your date ranges start with last year's date, then those would populate first, while the more recent and future dates will appear at the bottom of the list.
Descending is the exact opposite. Where any future and current dates will appear at the top of the list, and older dates towards the bottom.