The "Thousand Lantern Festival" (Pranee Khom Saen Duang) is an integral part of Yi Peng (the Lanna equivalent of Loy Krathong). Held in Lamphun Province, the tradition is an act of veneration and devotion (Phutta Bucha) to the revered Phra That Hariphunchai Pagoda and to honor Queen Chama Thewi, the city's first monarch.

This custom reflects the Lanna belief that crafting and hanging lanterns is a way to worship the Buddha residing in the heavens. The light from the lanterns is thus seen as a beacon of prosperity, peace, and guidance toward a better life.

Attendees often write their names and wishes on the lanterns before hanging them within the temple grounds and public areas, hoping that the glowing light will carry their aspirations to the heavens.

The beauty of the festival is not limited to the temple grounds; the entire city of Lamphun is adorned with lanterns of various colors, transforming the streets into illuminated tunnels of light that shine throughout the night. This warm and deeply spiritual atmosphere fosters a sense of unity and communal energy among both locals and tourists.

Every year, there is a magnificent lantern procession. People from various communities bring their meticulously decorated lanterns to parade through the streets up to Phra That Hariphunchai Temple. This parade serves as an act of Buddhist devotion and a shared expression of faith.

Beyond admiring the lanterns and the procession, visitors can enjoy the cultural market lining the city streets. This market gathers OTOP products and handicrafts from local community groups. Visitors can experience the Lamphun way of life by browsing and purchasing traditional cotton brocade fabrics, jewelry, woodwork, and local cuisine. The market's ambiance, under the glow of the evening lanterns, enhances its charm and memorability, making it one of the must-visit spots during the festival.

In the current era, the organization of the Thousand Lantern Festival is no longer solely a sacred ceremony; it has also been developed into an activity that actively promotes tourism and the local economy. Lamphun Province has introduced more diversity with Lanna music and arts events, setting up stages for both local folk artists and contemporary performers to showcase their talents.

Additionally, the festival now features areas for coffee tasting, art exhibitions, and art workshops that interested visitors can join. These additions ensure the festival appeals not only to those wishing to preserve tradition but also to attract modern tourists interested in culture and the arts.

As the year draws to a close, the festival atmosphere remains lively with New Year's Eve and New Year celebrations, all taking place under the constant, bright glow of the lanterns. Locals and tourists gather to make wishes and usher in new beginnings together.

The temple grounds and various public squares become bustling hubs of activities and music, demonstrating that the Thousand Lantern Festival is not merely a spiritually valuable ritual. It is also a stage for happiness and cooperation between the local community and visitors, who collectively create a memorable experience every time the event is held.