Three-day new year (mid-April). Cities empty as locals head home; many shops and services close.

Ancient royal rite in Phnom Penh marking the start of the planting season. Usually May.

Fifteen days honouring ancestors; Phnom Penh empties as people return to home provinces. Lunar dates, Sep–Oct.

🌙 The 15 waning-moon days of the Khmer month of Photrobot (the 10th), ending on the new moon of late September or October; the last three are public holidays.
Next date: 16–30 Sep 2027 (approx., may be a day off)

Boat races on the Tonlé Sap draw huge crowds to Phnom Penh. Lunar dates, usually November.

🌙 Three days around the full moon of the Khmer month of Kadeuk (the 12th), between late October and late November.
Next date: 23–25 Nov 2026 (approx., may be a day off)