2026 Daylight Hour @ CSI

Join us on Tuesday, June 17, 2025, on the Great Lawn where participants from all over the world will turn off their lights for one hour (12 – 1pm local time) and share their experiences via social media.

Join the #DaylightHour campaign to promote sustainability and save energy.

Daylight Hour is an annual social media campaign raising awareness about energy efficiency in our office spaces.

Know what’s Happening Next — before everyone else does.

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Host or Publisher CSI Office of Sustainable Community Planning