This is the wiki for the Lockdown Festivals from the ACE300 universe that occur in the Eysin books or otherwise.

Twice a year The Swarm comes closer to the ground and start hunting humans for two weeks. In 300 years, not being able to disable to lockdowns in any manner, people adapted by making into an in-doors event, calling it a Lockdown Festival.

Osel and Ceremony host festivals in their old mansions. It is also customary just to pool a few families together and hold out the lockdown under one roof.