Here are this year's dates of Uposatha days as observed by the two sects of Thai Buddhism (Dhammayutika and Mahānikāya).

  Last quarter moon New moon First quarter moon Full moon Last quarter moon New moon
January 1 7 15 22 30 -
February - 6 14 21
Māgha Pūjā
29 -
March - 6 14 21 29 -
April - 5 13 20 28 -
May - 5* 13* 19
Visākha Pūjā
27 -
June - 3 11 18 26 -
July - 3* 11* 17
Āsaḷha Pūjā
25 -
August - 1 9 16 24 31*
September - - 8* 14 22 29
October - - 7 14
Pavāraṇā Day
22 29*
November - - 6* 12
Ānāpānasati Day
20 27
December - - 5 12 20 27*

Dates marked with an asterisk (*) are one day behind the Thai Mahānikāya calendar.

Dates for this calendar were provided by Metta Forest Monastery.