Celtic Heroes

What are our best guesses at EG boss spawn times? I always though it was window opens after 2 days, 1 day window. 3 days max spawn time. Recently we've been having longer wait times though. Anyone got idea on the max spawn time? I haven't noticed this for Dino but it maybe the same. It's been 3 days and like 11 hours on Epona and gele, bt are still down. (its also happened a couple times before.

On Gwydion we use 2 days till the window opens and then a 2 day window for gele bt and Dino

The big 3 have always been 48/48 downtime/window like above comment says

Ok thanks