The Most Precious Blood Of Our Lord Jesus Christ - 1 July

Quoted from Wikipedia [1]:

The Feast of the Most Precious Blood of Our Lord Jesus Christ is a feast, which has been in the General Roman Calendar from 1849 to 1969. It is focused on the Blood of Christ and its salvific nature.

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... Pope Pius officially included the Feast of the Most Precious Blood of Our Lord Jesus Christ in the General Roman Calendar, for celebration on the first Sunday in July, that is the first Sunday after 30 June, which is the anniversary of the liberation of the city of Rome from the insurgents.

In reducing the number of feasts fixed for Sundays, Pope Pius X assigned the date of 1 July to this feast. In 1933, Pope Pius XI raised the feast to the rank of Double of the 1st Class to mark the 1,900th anniversary of Jesus's passion. In Pope John XXIII's 1960 revision of the General Roman Calendar, it was made a Class I Feast (see General Roman Calendar of 1960).

The feast was removed from the General Roman calendar in 1969, "because the Most Precious Blood of Christ the Redeemer is already venerated in the solemnities of the Passion, of Corpus Christi, of the Sacred Heart of Jesus, and in the feast of the Exaltation of the Holy Cross. But the Mass of the Most Precious Blood of Our Lord Jesus Christ is placed among the Votive Masses".

The feast nonetheless continues to be celebrated as a solemnity in calendars of some religious orders such as the Missionaries of the Precious Blood, the Congregation of the Passion of Jesus Christ, and the Adorers of the Blood of Christ. Furthermore, it is celebrated by parishes and communities that observe the 1962 Calendar. The whole month of July is still kept dedicated to the Most Precious Blood.

[1] https://en.wikipedia.org/wiki/Feast_of_the_Most_Precious_Blood, quoted without hyperlinks and references, bold type original.