Vietnam’s Tết Trung Thu — the Mid-Autumn Festival — falls on the 15th day of the eighth lunar month. In 2026 that lands on Friday 25 September, making it a long-weekend event with Friday evening through Sunday being the main celebration window. It’s one of the most visually striking festivals in the Vietnamese calendar, and knowing where to be makes a significant difference.
What the Festival Actually Is
Tết Trung Thu centres on children, the harvest moon, and lanterns. In practice, for travellers, it translates to streets full of handmade paper lanterns in every colour imaginable, lion dance performances on the main streets, and market stalls selling bánh trung thu (mooncakes) in both traditional lotus seed and modern flavours. The atmosphere is deliberately communal — this is one of the few festivals where participating as an outsider is actively welcomed rather than politely tolerated.
Best Places to Be: Hanoi
Hanoi’s Old Quarter concentrates most of the action. Hàng Mã Street — already famous year-round for decorative goods — transforms completely in the week before the festival into a lantern market of extraordinary scale. The main lantern processions happen along Hoàn Kiếm Lake on the evening of 25 September, typically from around 19:00. The area around the Turtle Tower and Ngọc Sơn Temple becomes a gathering point for thousands of families. Best tours in Hanoi that cover the Old Quarter and the lake area are heavily booked during festival week — book at least two to three weeks ahead.
Best Places to Be: Hội An
Hội An’s Ancient Town turns off its electric lighting on the evening of the full moon, leaving the streets to lanterns alone. The Hội An Lantern Festival happens every month, but the Mid-Autumn Festival edition is the most elaborate of the year. The Thu Bồn River fills with floating candle lanterns, and traditional boat races happen along the waterfront during the day. Accommodation in Hội An’s Ancient Town and the immediate riverside fills out weeks before the festival; the surrounding Cửa Đại beach area is easier to book and is only a short taxi ride away.
Mooncakes: A Practical Note
Mooncakes are sold in tins as gifts and individually in bakeries from about two weeks before the festival. Traditional versions contain lotus seed paste with salted egg yolk, but contemporary Vietnamese bakeries produce varieties with pandan, durian, matcha, and chocolate. The packaged tins make excellent gifts and are airport-transportable. Most major bakeries — Brodard in Ho Chi Minh City, Bảo Phương in Hanoi — start running short of the most popular flavours by 23 September.
Weather in Late September
Central and northern Vietnam are in the transition period between wet and dry seasons by late September. Hanoi sees reducing rainfall but occasional showers remain possible. Hội An in late September is warm (28–32°C) with moderate rainfall — occasional afternoon rain won’t disrupt evening outdoor events. Da Nang and Ho Chi Minh City are also solid bases for the festival, though Hội An remains the most photogenic setting.
The 25 September date is confirmed by the Vietnamese lunar calendar. It will not shift.