I do! Here are some Vulcan holidays:
-Kal Rekk, an important but modest holiday spent in solitude, sitting in silence and meditating about your lapses in logic and control over the previous year.
-Tal-Shanar, a holiday that no offworlder has ever been allowed to see, and for this reason very little is known about it. It seems to be a very spiritual celebration focusing on self-examination in respect to the violent history of the Vulcan race.
-The Festival of T’Plana-Hath, celebrating the life and works of this famous Vulcan historian and philosopher. It also involves a good amount of contemplation and meditative practices.
-Uzhaya wak-krus, the season of renewal. A spring festival celebrated in some of the provinces of Vulcan like Raal and Shi’Kahr. Originally a time of reflection and restorative meditation and exercises at the beginning of the calendar year, it seems to have gained with tourists and Starfleet Academy students looking for a “spring break” equivalent.
-Surak’s Memorial (not to be confused with the monument of the same name located in Shi’Kahr).
There are of course other smaller, unofficial celebrations and special occasions such as bonding ceremonies, local music festivals, etc. And finally, an honorable mention:
-Rumarie, a pagan festival that has not been celebrated since the 14th century. It involved feasting, naked dances and presumably other types of (now unacceptable) debauchery.