World Menstrual Hygiene Day is observed every year on ________ date ? By taleemified - June 13, 2020 71 (a) 26 May (b) 27 May (c) 28 May (d) 29 May World Menstrual Hygiene Day is observed on May 28. Its mission is to break the silence, raise awareness and change negative social norms surrounding MHM around the world. Women experience a monthly biological cycle known as menstruation or a period.