April 17 is the 107th day of the year in the Gregorian calendar, and it falls in the spring season in the Northern Hemisphere. This date is often associated with various historical events, holidays, and observances around the world. For example, it is recognized as World Hemophilia Day, which aims to raise awareness about hemophilia and other bleeding disorders. In the United States, April 17 is notable for being the deadline for filing federal income tax returns. This date can lead to increased activity at post offices and tax preparation offices as individuals rush to meet the deadline. Additionally, it may coincide with various local events and celebrations, depending on the region.