Today is 'Lady Day'.

In the western liturgical year, Lady Day is the traditional name of the Feast of the Annunciation of the Blessed Virgin (25 March) in some English-speaking countries. It is the first of the four traditional English quarter days. The "Lady" is the Virgin Mary. The term derives from Middle English, when some nouns lost their genitive inflections. "Lady" would later gain an -s genitive ending, and therefore the name means "Lady's day".

Credit: Wikipedia, the free encyclopedia.