When Mother's day celebrating in UK?

The United Kingdom celebrates "Mothering Sunday" on the fourth Sunday of Lent.

A bit of history:

Mothering Sunday dates back centuries to a time when it was considered important for churchgoers to visit their home or "mother" church once a year. In a land where children were often sent off to other villages to work at young ages, it became a time for celebrations and family reunions. Mothering Sunday became a day when children and domestic servants were given a day off to visit their families.

Celebrating Mothering Sunday

Today, Mothering Sunday is a day to recognize mothers for all their love and support with fresh flowers, sweets, cards, and other tokens of appreciation.