Join us for AstroDay 2026 at the Prince Kuhio Plaza in Hilo on Saturday, May 2, from 10:00a to 4:00p! Explore the marvels of space and technology at the 24th annual AstroDay — a free, interactive science celebration. More than 30 organizations will host demonstrations, games, and activities highlighting astronomy, robotics, and the natural sciences.

Expect hands-on activity stations, live science demonstrations, robotics, and award presentations at the mid-mall stage, with live coverage by KWXX/B93 Radio. Don't miss the announcement of the 2026 Maunakea Coin Contest winners at 11:30a, and be sure to collect AstroDay coins throughout the day to enter to win prizes, including telescopes and skateboards.

Star Wars “characters” will be roaming the event throughout the day, offering opportunities for photos and interactive experiences for attendees of all ages. One of the most popular attractions, the "Robot Rumble" returns with 15 robotic teams from across Hawaiʻi Island facing off in head-to-head competition, presented by the Hawaiʻi Science and Technology Museum (HSTM).