As we approach the summer solstice—the longest day of the year—we’re reminded of the powerful connection between the Sun and our lives. In 2025, the summer solstice will occur on June 21 at 2:42 a.m. GMT, which translates to June 20 at 7:42 p.m. PDT at the Battle Point Observatory.
For scientists, the solstice is a key marker in Earth’s orbit around the Sun. It helps us understand axial tilt, seasonal change, and the ways solar energy shapes our climate and ecosystems. Observatories and researchers across the globe use this moment to track solar patterns, calibrate instruments, and connect modern astronomy to ancient practices.
Historically, the summer solstice has been deeply significant to cultures around the world. Stonehenge in England and Chaco Canyon in New Mexico are just two of many ancient sites aligned with the solstice sunrise or sunset. These monuments reveal how early civilizations used the skies to mark time, organize agriculture, and celebrate renewal.
Whether through science or tradition, the summer solstice continues to inspire wonder—a reminder that we are part of something much larger, in tune with the universe.
Celebrate this year’s longest day of the year at summer solstice with us: June 21st at the Battle Point Observatory Grand Re-Opening!
