Need Help Rearranging Sub Galleries

I cannot figure out how to rearrange my main sub galleries.  I have 2 main menu links.  One for event proof and another for client galleries. The event proofs are then broken down into sub galleries by year and then within that by event. I can move around the individual event galleries but the main gallery with the years is out of order and I would like to have 2025 as the first in the list.  

Thanks for the help!

You will need to edit each of the categories and assign a display value. The lowest numbers display first (1, 2, 3, etc...).

See attached. 

Thank you!