Here is the Thai Chinese calendar, bought from Chinatown in Bangkok for 10baht.
This small functional calendar could easily fit into the handbag or wallet and contains:
1. Months and dates in romanised words and numbers
2. Thai observance dates and important holidays in Thai language.
2. Chinese lunar calendar month containing dates of full moon and new moon.
Even non Thai people would be able to understand the calendar. So far, I only see these calendars being sold in Chinatown and not anywhere else in Bangkok.
Since it is not easy to find a calendar that combines both, herein are the screenshots of the calendar from August 2013 to December 2013:
That would help oversea friends who wish to plan or follow certain observation dates.