The Visitation Of The Blessed Virgin Mary - 2 July

Quoted from Learn Religions [1]:

The feast of the Visitation of the Blessed Virgin Mary celebrates the visit of Mary, the Mother of God, with the child Jesus in her womb, to her cousin Elizabeth. The visit took place when Elizabeth was herself six months' pregnant with the forerunner of Christ, Saint John the Baptist.

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For close to six centuries, the Visitation was celebrated on July 2, but with his revision of the Roman calendar in 1969 (at the time of the promulgation of the Novus Ordo), Pope Paul VI moved the celebration of the Visitation of the Blessed Virgin Mary to the last day of the Marian month of May so that it would fall between the feasts of the Annunciation and the Birth of Saint John the Baptist—a time when Luke tells us that Mary would certainly have been with Elizabeth, taking care of her cousin in her time of need.

[1] https://www.learnreligions.com/visitation-of-the-blessed-virgin-mary-542483#:~:text=For%20close%20to%20six%20centuries%2C%20the%20Visitation%20was,of%20her%20cousin%20in%20her%20time%20of%20need.