September 2025 in Thailand: Festivals and Major Events

September in Thailand offers a gentle start to the season with cultural highlights, music and dance performances, international festivals, and exciting sports challenges. Here’s the full program for the month.

National Event in September

Thai National Flag Day

Under King Rama VI, the tricolor flag, known as thong trai rong, was officially adopted on September 28, 1917. Since then, September 28 has been recognized as Thai National Flag Day, celebrated across the country.

Thailand National Flag: History, Symbols and the September 28 Celebration

The Thai national flag, the Thong Trairong, embodies the nation, Buddhism, and the monarchy. On September 28, Thailand commemorates its official adoption with National Flag Day.

Festivals in September

Bangkok Gems & Jewellery Fair 2025 – Bangkok

The Bangkok Gems and Jewellery Fair is Asia’s oldest trade exhibition of its kind. Organized by the Department of International Trade Promotion (DITP) and the Gem and Jewelry Institute of Thailand (GIT), the fair showcases a wide range of products, from raw gemstones to finished jewelry.

Phanom Rung Light Phenomenon (Sunrise) – Buri Ram

Visitors can witness the sunrise shining perfectly through the 15 doorways of Prasat Hin Phanom Rung. This natural phenomenon occurs four times a year, with two sunrises in April and two in September.

Music in September

Sting 3.0 Concert

27th International Festival of Dance and Music

This festival is a major cultural highlight, featuring a diverse program of music, dance, and international performances. This year’s lineup includes the China National Acrobatic Troupe, Cuba Vibra, and Plácido Domingo.

Sports in September

Scenic Half Marathon Krabi

This coastal race between Ao Nang Beach and Krabi Town offers breathtaking views of beaches, limestone cliffs, and islands like Ko Phi Phi. Multiple distances are available (3K, 5K, 10K, 21K), with a festive atmosphere blending sports, local culture, and tropical landscapes.

Chiangmai 22K, Doi Suthep

This race starts at Chiang Mai Zoo and runs through both urban and natural landscapes, finishing near the famous Doi Suthep temple. Distances include 5K, 10K, and 22K, all held at night in the cooler atmosphere of the rainy season.

Loma Run on the Beach – Pattaya

A fun charity race in Pattaya with 5K, 10K, and 21K options, suitable for all levels. The course combines city streets and beach sections, creating a festive and community-driven atmosphere.

Chiang Mai 24-Hour Challenge

An endurance event around Nong Khieo Lake where participants select their challenge duration (2h to 24h) and aim for personal distance milestones. With no finish line or stopwatch, it’s a test of mental and physical resilience.

Road to Gravel – Nakhon Ratchasima

A cycling weekend celebrating both road and gravel biking with two scenic 80 km routes: road in Pak Chong (Saturday) and gravel in Si Khio (Sunday). Not a competitive race, but a festive cycling escape for enthusiasts.

Cultural Events

48th Khong Dee Mueng Nara Fair 2025

Held at the King Rama V Memorial Park, this fair features traditional crafts, food, local arts, dove-singing contests, exhibitions, and traditional boat races. It’s a family-friendly festival that showcases southern Thai identity.

Akha Swing Festival 2025

This traditional festival marks the Akha New Year and honors the goddess E-Um Sa Yae with giant swing rituals, cultural performances, and tribal markets. Main celebrations take place September 6–7 at Sam Yaek Akha Village, with additional festivities in Ban Phahee and Doi Pha Mee from September 4–8.

Chronological Table of Events in September 2025

FAQ: Thailand Events in September 2025

What are the main cultural festivals in September 2025?
Highlights include the Khong Dee Mueng Nara Fair in Narathiwat, the Akha Swing Festival in Chiang Rai, and the Phanom Rung Light Phenomenon in Buri Ram.

Which concerts and performances take place in September 2025?
The biggest events are Sting’s concert in Bangkok on September 25 and the International Festival of Dance and Music from September 6 to October 15.

What sports events are happening in September 2025?
Key races include the Scenic Half Marathon in Krabi, the Chiangmai 22K at Doi Suthep, the Loma Run in Pattaya, the Chiang Mai 24-Hour Challenge, and Road to Gravel in Nakhon Ratchasima.

What is the Bangkok Gems & Jewellery Fair?
It’s Asia’s most established trade fair for gemstones and jewelry, held in Bangkok from September 9–13, 2025.

Is there a national day in September?
Yes, September 28 is Thai National Flag Day, celebrating the adoption of the current national flag.

For all other events in Thailand all year round

Explore Thai Culture and Traditions: Events, Festivals, Gastronomy, and Nature

The Thailand culture and traditions section includes general information on a country with multiple cultural traits, such as art, music, dance, literature, religion, festivals, and cuisine, reflecting its long history and diverse ethnic groups.