Wood gathering festival. It was popular because of the bait and switch scam going on with sacrificial offerings.
God wants the labor of your hands and not necessarily money. So people would raise a blue ribbon type of lamb, calf or whatever to sacrifice. But then the priests would "find" a flaw, a blemish, it would dehydrated....whatever. So you would have to sell it and buy another. The lamb would be sold for Roman money but then when it came time for buying one it would have to be done with Temple money....so first you would have to exchange the money. Everyone taking a small bit along the way....and the gift of the labor of your hands was long since gone.
Once a year the wood was brought in to the temple for the altar by the people. So long as it was dry and not rotten it was good. Everyone loved it because it was a labor of love from their hands to God's hand....and no freaking money changers in the middle of it all. (It's really cool to put something you worked hard to make, produced, crafted into God's hands and He loves it)
The wood gathering festival was called the zylaforee xylafory festival....something like that....transliteration is not my strong suite.