From 1-4 March 2015

Makha Puja Day is one of the most important Buddhist holy days in Thailand. Each of the 30,000 Buddhist temples across the nation holds its own ceremony to mark the occasion. 

http://www.thaifestivalblogs.com/2015/02/11/makha-puja-hae-pha-khuen-that-festival-in-nakhon-si-thammarat-from-1-4-march-2014/

Unfortunately I could not found the program 2015 but I assume that the program will be almost similar as the program from 2012 which I found on the internet. Please scroll down to see the information in English. 

http://www.thailand.net.au/enews/feb2012/images/makhapuja.pdf