Unlike Christmas or Easter one does not ‘celebrate’ Ash Wednesday.
It is traditionally a day of mourning, penance, fasting and abstinence when we remember our sins and the increasing evil of the world. For 40 days one is supposed to mortify oneself & try to make atonement for the evil we have committed in the past year in the hope that we will be ready/purified to greet the Risen Christ on Easter Morn. During this period we should abstain from small luxuries - chocs. cigs. booze, TV, movies. InterNet.
( If we can’t then we should ask: Am I addicted to this stuff?
Even atheists now realize that an annual period of 'cleansing/abstinence ’ works wonders for the body ( as well as the soul.)