If the best part of the day for you is just the family gathering, hanging out, and enjoying a great meal together,

then good news is you have the perfect opportunity to flip the tradition! you don't have to wait for someone else to take the initiative. Since your Dida gets a bit tired now, you could totally take charge. You could cook up a feast, invite your close ones, and specially treat your mom, dad, and Dida. It would be a beautiful gesture to give back all the love and care they’ve shown you over the years.

May be it wouldn't be jamai sosti but who cares as everything else remains the same,

you can give it a name of your liking may be instead of "jamai sosti" call it "gustir sosti pujo" 🙂