The Feast of the Ascension of Our Lord is a holy day of obligation in the UK, when all Catholics are obliged to assist at Holy Mass, as well as “to abstain from those works and affairs which hinder the worship to be rendered to God, the joy proper to the Lord’s day, or the suitable relaxation of mind and body”, unless “family needs or important social service” so require.

CIC (1983) c.1247; CCC (1997) §2185