Ash Wednesday: Christian date which marks the beginning of the lent.
Lent: the 40 day period before palm sunday that represent the 40 days where Jesus was in the dessert being tempted by the devil.
H-Ash Wednesday: Since we're not Jesus, and everyday the devil has more ways to tempt us (such as, the internet, facebook, urban dictionary), we can't stand not even one day and we're starting the Lent sining.
As the name suggests that during that day you should consume as many hash/weed.
Hash wednesday is a really good way to finish carnivals.