Hi Debby, Better late than never?! Sorry for the very late response, however we lost control of our business listing of a period of time. The date is always November 2nd. Here is a helpful link on this annual event. https://www.yosemite.com/events/hornitos-day-of-the-dead/
I can't answer that, as I was a visitor there myself. If you Google it, though, I am sure you'll find the date and time.
Thanks! Your answer is awaiting moderation.