In anticipation of the Irish National Grandparents Pilgrimage, a Catholic group has launched a search for the oldest grandparents in Ireland.

The Catholic Grandparents Association (CGA) has issued an invitation for the oldest grandparents and longest married couple to attend the 17th annual pilgrimage.

"Please help us find the longest married couple in Ireland and the oldest grandparents to come celebrate with us and be honoured at our annual national grandparents pilgrimage at the Shrine of Our Lady of Knock," the organization said, according to Irish news.

On September 8, thousands of grandparents from all over Ireland will travel to Knock Shrine in County Mayo. The event draws over 10,000 attendees each year.

The deadline for entries into the grandparent search is August 30. According to Irish News, participants may email their submission to catholicgrandparents@gmail.com.

The national shrine has been a destination for pilgrims since 1879, when 15 townspeople witnessed an apparition of the Blessed Mother, St. Joseph, St. John the Evangelist, angels, and Jesus Christ - as the Lamb of God - on the south gable of the town church, which was named St. John the Evangelist. For a period of about two hours, a crowd gathered to adore the apparition and to pray the rosary. Despite the rainstorm, the ground around the gable did not get wet.

The shrine began hosting the National Grandparents Pilgrimage in 2007.

The CGA was formed two years later to manage the pilgrimage. It has a goal of providing grandparents in the country with the encouragement to support their families. Both the pilgrimage and the organization were founded by Catherine Wiley.

"This association grew out of our Grandparents Pilgrimages, where thousands of grandparents gathered in recent years, united by the same goal to do the very best we can for our children and grandchildren," the organization says on its website.

"Grandparents' vital contribution to the family, the Church and society was never as important as now," it adds.