Dear Sawti,
I think Holi is agood time to celebrate, bcoz after that it'll be months befre anything else for employees can be arranged.
I believe in keeping it Simple where employees gather to enjoy and connect with each other.
So, it can be a small party after 5.00 pm for 2-3 hrs, a snacks party where the HR will falicitate everybody with a Gulal tika and a box of Sweets.
You can choose from varied items for snacks keeping in mind the background and tastes of the enployees.
Also, keep some games, light ones to keep them active and the party happening. You can also keep Holi Antarakshi Competition and all..
Best of Luc
Paulami Das