Seward's Day is a state holiday observed in Alaska, United States, to commemorate the signing of the Alaska Purchase treaty on March 30, 1867. It is named after William H. Seward, who was the U.S. Secretary of State at the time and played a key role in negotiating the purchase of Alaska from Russia for $7.2 million, or about two cents an acre. The transaction was initially mocked as "Seward's Folly" or "Seward's Icebox" by those who saw little value in the remote territory.

The holiday is observed on the last Monday of March each year, rather than specifically on March 30th. On Seward's Day:

• State Closure: Many state government offices and schools are closed.
• Commemorative Events: There can be ceremonies and educational events that highlight the historical significance of this day.
• Public Interest: Alaskans may take this time to reflect on their state's history and explore cultural heritage through various events.

Though not marked by widespread traditions such as parades or festivals, Seward's Day serves as an opportunity for Alaskan residents to learn more about their state's origins and to appreciate its development since being purchased from Russia over a century ago.