The Assumption of Mary is a significant religious holiday celebrated annually in Poland on August 15. Also known as Wniebowzięcie Najświętszej Maryi Panny in Polish, it commemorates the belief in the physical elevation of Mary, the Mother of Jesus Christ, into Heaven at the end of her earthly life. This national holiday has been solemnly celebrated in Poland since the 15th century.

On this day, churches in Poland are filled with faithful worshipers attending the Mass. Many Poles also take part in the annual pilgrimage to the Jasna Góra Monastery in Częstochowa, home to a revered icon of the Virgin Mary which is believed to have miraculous powers. The procession involves thousands of pilgrims walking hundreds of kilometers over many days to reach the monastery, reflecting their deep faith and devotion.

In addition to its religious significance, the Assumption of Mary also holds a secular importance as it coincides with the 'Armed Forces Day' in Poland. The celebrations on this day include military parades and various patriotic events. This adds an element of national pride to the religious observance. Whether Poles are attending Mass, participating in pilgrimages, or watching a parade, the Assumption of Mary is a day of spiritual reflection, patriotism, and cultural unity among all Poles.