- Bismarck's official city calendar lists a Board of Equalization meeting on April 7, 2026, 5:15 PM - 6:15 PM at an unspecified event location, but this is a government board session, not a community event, festival, fair, or public gathering.[3] - Events in nearby Mandan (across the Missouri River from Bismarck) include National Public Health Week (April 6–12, all-day, free activities like blood pressure screenings, silent dance party, and Stroll N Roll walk on April 8; no registration or fee r