Holidays in Thailand for 2021
Discover the official list of public, bank, and religious holidays in Thailand for 2021. Use this comprehensive guide to stay informed about important dates and observances across the country.
| Date | Weekday | Name | Notes |
| January 4th | Monday | Cavalry and Armor Day | - |
| January 9th | Saturday | National Children's Day | - |
| January 13th | Wednesday | National Aviation Day | - |
| January 14th | Thursday | National Forest Conservation Day | - |
| January 16th | Saturday | Teachers' Day | - |
| January 18th | Monday | Royal Thai Armed Forces Day | - |
| January 27th | Wednesday | National Dairy Day | - |
| February 2nd | Tuesday | Inventor's Day | - |
| February 2nd | Tuesday | National Agriculture Day | - |
| February 3rd | Wednesday | Veterans' Day | - |
| February 10th | Wednesday | Volunteer Defense's Day | - |
| February 24th | Wednesday | National Artist Day | - |
| February 25th | Thursday | National Radio Day | - |
| February 26th | Friday | Cooperatives Day | - |
| February 26th | Friday | Makha Bucha | - |
| March 5th | Friday | Journalist's Day | - |
| March 13th | Saturday | National Elephant Day | - |
| March 31st | Wednesday | King Nangklao Memorial Day | - |
| April 1st | Thursday | Civil Service Day | - |
| April 2nd | Friday | National Children's Book Day | - |
| April 2nd | Friday | Thai Heritage Conservation Day | - |
| April 6th | Tuesday | Chakri Memorial Day | - |
| April 8th | Thursday | Anniversary of the Ministry of Defense | - |
| April 9th | Friday | Royal Thai Air Force Day | - |
| April 10th | Saturday | National Rubber Day | - |
| April 12th | Monday | Day before the Songkran Festival | - |
| April 13th | Tuesday | Songkran Festival | - |
| April 14th | Wednesday | Family Day | - |
| April 14th | Wednesday | Second Day of the Songkran Festival | - |
| April 15th | Thursday | Third Day of the Songkran Festival | - |
| April 25th | Sunday | King Naresuan Day | - |
| April 30th | Friday | Consumer Protection Day | - |
| May 1st | Saturday | National Labor Day | - |
| May 4th | Tuesday | Coronation Day | - |
| May 14th | Friday | Thai Buffalo Conservation Day | - |
| May 26th | Wednesday | Visakha Bucha Day | - |
| May 30th | Sunday | King Prajadhipok Day | - |
| June 3rd | Thursday | Birth of Queen Suthida | - |
| June 9th | Wednesday | Ananda Mahidol Day | - |
| June 25th | Friday | National Iodine Day | - |
| June 26th | Saturday | Sunthorn Phu Day | - |
| July 1st | Thursday | National Scout Organization Day | - |
| July 24th | Saturday | Asahna Bucha Day | - |
| July 25th | Sunday | Buddhist Lent | - |
| July 28th | Wednesday | Birth of the King | - |
| July 29th | Thursday | National Thai Language Day | - |
| August 1st | Sunday | Thai Women's Day | - |
| August 12th | Thursday | Birth of the Queen Mother | - |
| August 12th | Thursday | Mother's Day | - |
| August 16th | Monday | Thai Peace Day | - |
| August 18th | Wednesday | National Science Day | - |
| August 22nd | Sunday | Ghost Festival | - |
| September 4th | Saturday | Royal Thai Navy Submarine Memorial Day | - |
| September 9th | Thursday | Huai Kha Khaeng Thung Yai Naresuan Wildlife Sanctuaries World Heritage Day | - |
| September 15th | Wednesday | Silpa Bhirasri Day | - |
| September 19th | Sunday | Thai Museum Day | - |
| September 20th | Monday | National Canal Conservation Day | - |
| September 20th | Monday | National Youth Day | - |
| September 24th | Friday | Mahidol Day | - |
| September 24th | Friday | Prince Mahidol Day | - |
| September 28th | Tuesday | Thai National Flag Day | - |
| October 1st | Friday | King Rama IV Memorial Day | - |
| October 6th | Wednesday | Vegetarian Festival | - |
| October 7th | Thursday | Second Day of the Vegetarian Festival | - |
| October 8th | Friday | Third Day of the Vegetarian Festival | - |
| October 9th | Saturday | Fourth Day of the Vegetarian Festival | - |
| October 10th | Sunday | Fifth Day of the Vegetarian Festival | - |
| October 11th | Monday | Sixth Day of the Vegetarian Festival | - |
| October 12th | Tuesday | Seventh Day of the Vegetarian Festival | - |
| October 13th | Wednesday | Eighth Day of the Vegetarian Festival | - |
| October 13th | Wednesday | King Bhumibol Adulyadej Memorial Day | - |
| October 13th | Wednesday | National Police Day | - |
| October 14th | Thursday | Democracy Day | - |
| October 14th | Thursday | Ninth Day of the Vegetarian Festival | - |
| October 21st | Thursday | National Annual Tree Loving Day | - |
| October 21st | Thursday | National Dental Hygiene Day | - |
| October 21st | Thursday | National Nurses' Day | - |
| October 23rd | Saturday | King Chulalongkorn Day | - |
| November 20th | Saturday | Royal Thai Navy Day | - |
| November 21st | Sunday | World Day of Remembrance for Road Traffic Victims | - |
| November 25th | Thursday | King Vajiravudh Memorial Day | - |
| November 27th | Saturday | National Health-Building Day | - |
| December 1st | Wednesday | Damrong Rajanubhab Day | - |
| December 4th | Saturday | Thai Environment Day | - |
| December 5th | Sunday | Father's Day | - |
| December 5th | Sunday | Birth of King Bhumibol Adulyadej | - |
| December 10th | Friday | Constitution Day | - |
| December 16th | Thursday | National Sports Day | - |
| December 28th | Tuesday | King Taksin Memorial Day | - |
Holiday data for far-reaching years is subject to change due to laws and government decrees.
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