The Catholic Church reserves June for a deeper devotion to the Sacred Heart of Jesus. Why did they select June?
What Does the Sacred Heart of Jesus Mean?
The Sacred Heart of Jesus represents His love for humanity. Like Mary’s Immaculate Heart, the Sacred Heart brings us into Christ’s interior life.
The Sacred Heart devotion inspires us to remember how much Jesus loves us, while also growing our desire to love Him back.
We especially need to love Him with so many who do not know about or outright reject His love.
Behold the Heart which has so loved men that it has spared nothing, even to exhausting and consuming Itself, in order to testify Its love; and in return, I receive from the greater part only ingratitude, by their irreverence and sacrilege, and by the coldness and contempt they have for Me in this Sacrament of Love. – Jesus to St. Margaret Mary Alacoque, 1675
Why is June the Month for the Sacred Heart of Jesus?
Catholics practiced the devotion to the Sacred Heart in private for centuries. The devotion grew when Jesus appeared to St. Margaret Mary Alacoque in the 17th century. In one of His messages He asked for a feast for His Sacred Heart:
For this reason I ask that the first Friday after the octave of the Feast of Corpus Christi be set aside as a special feast, to honor my Heart by communicating on that day, and making reparation for the indignity it has received. And I promise that my Heart will expand itself to pour out abundantly the influences of its love on all those who will give it this honor and get others to do the same.
The feast of Corpus Christi moves each year, meaning the Feast of the Sacred Heart is almost always in June.
In 1856, Pope Pius IX expanded the Feast of the Sacred Heart of Jesus to the universal Church.
In the early 20th century, popes granted indulgences to priests and the laity for different actions in June.