Families are welcome at the Monarch Haven and Reading Sanctuary at Red Mountain Library to celebrate the spring equinox. Southwest Monarch Study will share their expertise about monarch butterflies in Arizona. Mesa Environmental & Sustainability Department staff will share great landscape resources and provide tours of the nearby Monarch Haven & Reading Sanctuary park. The library will also provide crafts for kids to enjoy.

The spring equinox occurs when the sun crosses the equator line, heading north. This event marks the start of spring season in the northern hemisphere. For Mesa, the official spring equinox occurs on Thursday, March 20, 2025, at 2:01 a.m.