March 31, 2025 is just not a federal vacation in america. It’s a Monday and most companies, colleges, and authorities workplaces can be open.
Nonetheless, some states and localities might observe March 31 as a vacation. For instance, within the state of Hawaii, March 31 is named Kamehameha Day and is a state vacation. Kamehameha Day commemorates the start of Kamehameha I, the founder and first king of the Kingdom of Hawaii.