Asalha Puja Day and Wan Khao Phansa (Buddhist Lent Day); 19 July and 20 July are 2 of 4 (maybe 5) annual Buddhist holidays that are certain to be labeled as bar closure days.

In most jurisdictions they is observed on the calendar day (midnight to midnight)
For more info Google Asalha Puja Day and Wan Khao Phansa bar closures