Bespoke: Dressing up all the time in costumes you made yourself.
That said Allhallowtide has always been celebrated in Catholic countries, and Shakespeare mentions soul cakes in his plays. Obviously it's also a co-option of a standard Equinox Festival.
Most catholic celebrations probably are really traditional European celebrations since catholicism literally stole a bunch of pagan holidays, said "now its about jesus" and then said all these pagans are converted because they're celebrating catholic holidays.