Why is the Kathina robe-offering ceremony considered sacred?

#Culture
Kathina Robe-Offering Festival – A Cultural Tradition of the Southern Khmer People
The Kathina Robe-Offering Festival is one of the most significant and meaningful rituals in Theravada Buddhism, held following the three-month rains retreat. It is a solemn occasion for Buddhists to wholeheartedly offer Kathina robes to the Sangha, thereby demonstrating their reverence, gratitude, and support for the Triple Gem.