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Armagh Astropark: Stone Calendar
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The Stone Calendar

Atop Armagh Astropark's Hill of Infinity sits the Stone Calendar. Based on ancient stone circles, it allows us to tell the time of year by the direction of Sunrise and Sunset.

Imagine that all history is compressed into one year. Humans evolved only an hour ago, so two more circles have been added: the middle shows the last four days, and the inner one the final minute of December 31st.