Many countries (and states or provinces within) have holidays around Easter. For many Easter Monday is a day off. Some had Good Friday as a none working day and a few countries even had Maundy Thursday as a none productive day for most people.
The passed over Maundy Thursday was the day of The Last Supper. The famous Last Supper painting by Leonardo da Vinci has in my eyes, as told in a post from last year, something in common with Data Quality Evangelism.