In my opinion, they ARE important. Generally, people tend to focus on calendar events to mark their
celebrations. So they throw birthday parties, exchange gifts on
Valentine’s Day, have New Year’s eve bashes or get drunk after their
team wins a match against their arch-rivals. There must be celebrations, so you
will memorize the holiday. Celebrations are necessary: to save the
holiday year in year out. If there are not any celebrations, the holiday
may dead.