May 26 (last Sunday in May) - Algeria, Dominican Republic, Haiti, Mauritius, Morocco, Sweden, Tunisia, France and French Antilles (France is the last Sunday in May except if it coincides with Pentecost day (50th day after lent), in which case it is shifted to the first Sunday in June...
Outside the UK Whit Sunday is known as Pentecost, meaning "fiftieth day", as it is held on the 50th day from the beginning of the Easter season on Easter Sunday (including Easter Sunday in the counting). Some Christian denominations consider it to be the birthday of the Christian church ...
Many French-speaking countries celebrate Mother's Day on the last Sunday of May (or, in the case of France, on the first Sunday of June in years in which the last Sunday of May is Pentecost). For a complete overview of the dates of Mother's Day around the world see Mother's Day ...