On the evening of the full moon of the 12th lunar month, Thailand’s landscape is transformed by two entwined celebrations: the nationwide Loy Krathong, and in the north, the sky-lantern spectacle of Yi Peng.

This year the main events fall on 5-6 November, with the most striking mass lantern releases centred in Chiang Mai.

Across the country, participants craft small decorative baskets known as krathongs, typically made of banana trunks and leaves, flowers, incense and a candle.

They float these on rivers, canals and ponds as offerings to water spirits and as symbolic acts of releasing misfortune and welcoming new beginnings.

In Chiang Mai the festival rises a dimension higher.

Thousands gather to launch rice-paper lanterns, known as khom loi, into the night sky—each a drift of light that signifies hope, merit and renewal.

Along rivers such as the Ping and in the Old City moat, the combined spectacle of shimmering water and glowing sky creates one of Thailand’s most iconic annual scenes.

Although the celebrations are often picturesque and joyful, modern versions of the festivals also emphasise environmental and safety considerations.

Organisers increasingly recommend biodegradable krathongs and regulated lantern releases to minimise impact on waterways, wildlife and airspace.

Public authorities remind visitors to attend official events and respect local customs.

Since ancient times these illuminated ceremonies have provided Thais and visitors alike with moments of reflection, gratitude and community.

The dual imagery of light on water and lanterns aloft offers a vivid reminder that what we let go of can rise—and what we release may illuminate the path ahead.