I think the millennials and Gen Z folks are more enthusiastic about Halloween than previous generations. Maybe they think it's cool to cosplay as ghoulish creatures.
Don't forget the Halloween parties organized by the PAP grassroots, and the Halloween-inspired menu you find at many restaurants and cafes now.
Not sure why the other five pagan days have been neglected. The world only cares about Halloween, Christmas and Easter, with the last exclusively given to the Christians.
Halloween = Samhain
Christmas = Yule
Easter = Oestara