“Allies Day, May 1917” by Frederick Childe Hassam captures the vibrancy and patriotism of New York City during World War I. Painted as part of Hassam’s “Flag Series,” the work celebrates the United States’ entry into the war and the unity among Allied nations. The scene, set on Fifth Avenue, is a kaleidoscope of color and movement, with American, British, and French flags fluttering against a backdrop of bustling crowds and soaring architecture. Hassam’s Impressionist style is evident in the soft brushstrokes and luminous palette, which create a sense of vitality and optimism. The flags dominate the composition, symbolizing solidarity and shared purpose, while the city below hums with energy, embodying the modern spirit of New York as a hub of commerce and culture. Painted during a time of profound uncertainty, the work conveys a sense of hope and collective strength, offering a visual anthem for perseverance. Hassam was inspired by the public displays of flags he saw throughout the city, and his series became a defining statement of American Impressionism. “Allies Day, May 1917” is both a patriotic celebration and a poignant reminder of art’s ability to capture the mood of a nation during a pivotal moment in history.