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Note: The observance dates for 2021 has been updated. Please scroll down to the page to view.

Introduction on Buddhist Observation Days
The Observance Days are based on the traditional Buddhist calendar of new, full and quarter moons. During new and full moon days, or Uposatha Days, monks would gather to listen to the recitation of the Patimokkha rules. The weekly observance of the quarter moon is when lay devotees gather in the local monastery to observe the precept more strictly and listen to and speak about Dhamma. The basic, minimum standard is the 5 precepts for practicing lay Buddhists. However on Observance days (or other special occasion) they may decide to train under the Eight Precepts, which brings them closer to how the monk or nun practices.
Note: The New Moon and Full Moon observation dates may differ (marked as asterik below) from the Chinese lunar calendar.
YEAR 2020 (THAI YEAR 2563) (SEPT- DEC)
Click HERE to view the complete dates for year 2020.
SEPTEMBER 2020 (กันยายน 2563)
- 2 (Wed)- Full Moon
- 10 (Thu)
- 17 (Thu)- New Moon
- 25 (Fri)
OCTOBER 2020 (ตุลาคม 2563)
- 2 (Fri)- Full Moon
- 10 (Sat)
- 16 (Fri)- New Moon
- 24 (Sat)
- 31 (Sat)- Full Moon
NOVEMBER 2020 (พฤศจิกายน 2563)
- 8 (Sun)
- 15 (Sun)- New Moon
- 23 (Mon)
- 30 (Mon)- Full Moon
DECEMBER 2020 (ธันวาคม 2563)
- 8 (Tue)
- 14 (Mon)- New Moon
- 22 (Tue)
- 29 (Tue)- Full Moon
YEAR 2021 (THAI YEAR 2564)
JANUARY 2021 (มกราคม 2563)
- 6 (Wed)
- 13 (Wed)- New Moon
- 21 (Thu)
- 28 (Thu)- Full Moon
FEBRUARY 2021 (กุมภาพันธ์ 2564)
- 5 (Fri)
- 11 (Thu)- New Moon
- 19 (Fri)
- 26 (Fri)– Full Moon Magha Puja Day- click here to read the significance of the day
MARCH 2021 (มีนาคม 2564)
- 6 (Sat)
- 13 (Sat)- New Moon
- 21 (Sun)
- 28 (Sun)- Full Moon
APRIL 2021 (เมษายน 2564)
- 5 (Mon)
- 11 (Sun)- New Moon
- 19 (Mon)
- 26 (Mon)- Full Moon
MAY 2021 (พฤษภาคม 2564)
- 4 (Tue)
- 11 (Tue)- New Moon
- 19 (Wed)
- 26 (Wed)– Full Moon- WESAK DAY- click here to read the brief history and significance
JUNE 2021 (มิถุนายน 2564)
- 3 (Thu)
- 9 (Wed)- New Moon
- 17 (Thu)
- 24 (Thu)- Full Moon
JULY 2021 (กรกฎาคม 2564)
- 2 (Fri)
- 9 (Fri)- New Moon
- 17 (Sat)
- 24 (Sat)– Full Moon- Asalha Puja- read the significance of the Day
AUGUST 2021 (สิงหาคม 2564)
- 1 (Sun)
- 8 (Sun)- New Moon
- 16 (Mon)
- 23 (Mon)- Full Moon
- 31 (Tue)
SEPTEMBER 2021 (กันยายน 2564)
- 6 (Mon)- New Moon
- 14 (Tue)
- 21 (Tue)- Full Moon
- 29 (Wed)
OCTOBER 2021 (ตุลาคม 2564)
- 6 (Wed)- New Moon
- 14 (Thu)
- 21 (Thu)- Full Moon
- 29 (Fri)
NOVEMBER 2021 (พฤศจิกายน 2564)
- 4 (Thu)- New Moon
- 12 (Fri)
- 19 (Fri)- Full Moon
- 27 (Sat)
DECEMBER 2021 (ธันวาคม 2564)
- 4 (Sat)- New Moon
- 12 (Sun)
- 19 (Sun)- Full Moon
- 27 (Mon)
The dates above are based on the Thai Buddhist calendar. Do note that the dates may fall on a different date of the new moon/full moon of the Chinese lunar calendar
A day prior to the new/full moon observance day, the nuns will shave their hair. And on each observance day, the nuns and 8 preceptors would gather together for chanting. The schedule changes- sometimes Khun Mae may ask for then to chant together.
Still, Khun Mae has said, everyday is a good day for practice- it should be now, in the present instead of planning for the future, in which is not certain.
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