Constitution Day 2026: Nepal Marks 11 Years Since the Promulgation of the Constitution Nepal is observing Constitution Day and National Day on Saturday, September 19, 2026, marking the anniversary of the promulgation of the Constitution of Nepal. Constitution Day, known in Nepali as Sambidhan Diwas , is observed every year on Ashoj 3 of the Bikram Sambat calendar . The day commemorates the promulgation of Nepal's present constitution in 2015, which established the country as a secular, federal democratic republic and laid out the framework for its current system of government. The Constitution of Nepal was promulgated on September 20, 2015 (Ashoj 3, 2072 BS) following years of political transition and constitutional debate. It followed the end of the monarchy and the establishment of a republican system, while introducing a federal structure intended to distribute governmental authority among the federal, provincial and local levels. The constitution remains the country's fu...