Just found this thread, so I'll get right down to it....
The below list is not exhaustive. (The lack of capitals is intentional)
It's not that I dislike the days in particular, but rather the twats who use it as an excuse to try to sell you cards and crap you wouldn't want to be found dead in a ditch with.
Eff halloween (satanism, bullying, begging & robbery)
Eff bonfire night (animal cruelty, arson & pyromania)
Eff christmas & new year (adultery, domestic violence, gluttony, drunkenness & vomiting)
Eff valentines day (sad effs wandering around with bunches of flowers / effin' 'romantic' meals.
Eff easter (putting religion to one side, what's the big effin' deal about effin' chocolate effin' eggs?)
Eff mothers', fathers'(!), aunts'/uncles'(!!), grandparents' (!!!) days (effin' supermarkets).
Eff birthdays (age is no cause for celebration, especially when you're an old git!)
Spleen vented, I'm back in my box for now.