Mother's Day 2026 falls on May 10 in the US. Rooted in Anna Jarvis's 1908 tribute to her late mother, it became a national holiday in 1914. Not every country follows the same schedule. In the United Kingdom, Mothering Sunday falls on March 15, 2026, the fourth Sunday of Lent. Many Arab countries observe Mother's Day on March 21, the first day of spring.