What festival is Wudang Mountain on March 3rd?

On the third day of the third lunar month, red dates boil eggs, add some sugar after cooking, and there is no pain after eating, hehe!

I heard the old man say, "On March 3rd and September 9th, I can't go to the river without anything." It's rainy these two days, so don't make trouble, go to the river as little as possible, and pay attention to your health!