Friday, 5 December 2025
Thailand National Day marks the birthday anniversary of King Bhumibol Adulyadej the Great and is also observed as Father’s Day.
Also known as
- Birthday Anniversary of His Majesty King Bhumibol Adulyadej the Great
- Thailand Father’s Day
Frequently asked questions
- When is Thailand National Day 2025?
- Thailand National Day 2025 is on Friday, 5 December 2025.
- What day of the week is Thailand National Day 2025?
- It falls on Friday.
- How is Thailand National Day calculated?
- This event is observed every year on 5 December.