Manufactured for MDZ which is the Mezinárodní den žen or MDŽ in Czech, meaning International Day (of) Women.
The first International Womens days were held at the beginning of the 20th century. They are still observed in Europe, but seem to have been replaced by Mother's Day in the UK and the USA; which precludes Women who have not had children.
The MDZ celebration focuses on general celebration of respect, appreciation and love towards women for their economic, political and social achievements.
The official celebration day is March 8th.