Late 2014 the end of Buddhist Lent (Wan Awk Phansa) was announced as a fifth annual religious holiday that would be added to four others (Magha Puja (Makha Bucha), Visakha Bucha / Vesak Day, Asalha Puja Day, and Buddhist Lent Day (Wan Khao Phansa)) as a dry day starting 2015.

Many doubted that it would happen, but in 2015 it did become an addition.
Is it certain for 2016?
Time will tell, but if last year's enforcement is a barometer ... then yes.
My take is that the probability is very high.

For more info Google Wan Awk Phansa Bar Closure