U.S. Constitution Day - 2025

Wisconsin public school observance day required by statute. Representatives of 12 of the 13 original states signed the U.S. Constitution on September 17, 1787. The Constitution, with its 27 amendments, defines the federal system of government and embodies the principles on which this country was founded. When an observance day falls on a Saturday or Sunday, it should be observed on the preceding Friday or the following Monday.