Tu Bav and Shvat do not, afaik have preHoliday events (unless they used to and it kinda fell out now?)
I think it’s more that those holidays are even more minor than chanukkah and Purim. Like tu B’Av isn’t even described in the Gemara as current, it’s a “what they used to do back in the day”
it makes me sad sometimes cause there are sources saying tu b'av was once the biggest event of the year
















