1848 The Mexican-American War comes to an end with the signing of the Treaty of Guadalupe Hidalgo, through which Mexico transfers large areas, including California, Arizona, and New Mexico, to the United States. 1887 Punxsutawney, Pennsylvania, hosts the very first official Groundhog Day celebration. 1922 James Joyce publishes his groundbreaking novel Ulysses for the first … Continue reading This Day In History