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Selected Sundials in Hawai‘i

Kānaloa Stone — Kaho‘olawe

On Kaho‘olawe, the smallest island of the Hawaiian Islands and only seven miles from Maui, sits an endangered and sacred rock, the Kānaloa, with petroglyphs and a row of 32 cupules (man-made depressions) along one edge.

“It has significant celestial alignments with the rising and setting of the sun,” said Michael Naho'opi'i, executive director of the Kaho‘olawe Island Reserve Commission (KIRC).

It appears that there is a relationship between the shadow of a stick held vertically along lines etched in the stone and the cupules.

Documented as Site 110 feature BU, the Kānaloa stone is relatively flat and rests on a natural pedestal that when tapped, resonates with a bell-like ring. But its petroglyphs and alignment cups may soon topple into a nearby and ever growing ravine. In 2010 the commission approved "The Cultural Use Plan: Kūkulu Ke Ea A Kānaloa" with one of the recommendations to preserve and stabilize the stone. The first phase of the plan has been to document the stone's celestial alignments and quantify the erosion forces acting on its base

Kanaloa Stone
Kānaloa Stone Shadow Alignment
photo: Kaho'olawe Island Reserve Commission 

North American Sundial Society (NASS)

This website lists sundials throughout North America (USA, Canada, Mexico, Cuba, Costa Rica, Dominican Republic and Haiti). It also includes a Teachers Corner with sundial activities.

British Sundial Society (BSS)

This website includes an excellent section on How Sundials Work

Aiello del Friuli, Italy

This webite of Il Solo e il Tempo includes a map of the location of the dozens of sundials displayed in this town in Northeastern Italy (neabyr Gorizia).

• Each year, the sundial festival — known as Festa delle Meridiane — is held in Aiello del Friuli at the end of May.

• At one of the museums in Aiello is an ingenious mechanical device that models both flat and vertical sundials at various locations on the earth.