January
- 1 New Year's Day
- 30 Full Moon

February
- 12 Phangan Film Festival (to Feb 14)
- 15 Chinese Lunar New Year's Day
- 25 Re:Earth charity beach festival
- 28 Makha Bucha Day (Buddhist holy day)

March
- 1 Full Moon

April
- 6 Chakri Day (to honour King Rama I, founder of Bangkok)
- 13 Songkran (Thai New Year)
- 28 Full Moon

May
- 1 Labour Day
- 5 Coronation Day
- 29 Full Moon
- 31 Samui Regatta (to June 5)

June
- 26 Full Moon

July
- 1 Mid-year Bank Holiday
- 28 Full Moon

August
- 12 Her Majesty the Queen's Birthday (also Mother's Day)
- 25 Full Moon

September
- 18 Koh Samui Trophy Adventure Race
- 23 Full Moon

October
- 23 Chulalongkorn Memorial Day (in honour of King Rama V)
- 23 Full Moon

November
- 21 Full Moon

December
- 5 His Majesty the King's Birthday
- 10 Constitution Day
- 21 Full Moon
- 25 A Koh Samui Christmas