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See the Calendar Sundial



The Calendar Sundial in Galway, Ireland tells both the time of day and the month of the year. Located in Brigit’s Garden, a local park, the Calendar Sundial, built in 2006, is the biggest in Ireland. Its five-foot spike of bog oak, situated near the center of a stone circle, casts a shadow that can be used to determine much information with beautifully simple techniques. Elliptical lines carved in the stone show the passage of the shadow during the different months of the year, while the length of the shadow determines the time of day.

The Calendar Sundial can show the time and date to great accuracy using methods that have been available for thousands of years. Ironically, it sits in a country famous for its frequent rainy days.