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W15 | Sundial

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W15 | Sundial


This is an unusual sundial made of Valentia Slate.  It used to be situated beyond the Fog Signal House.  It was repositioned here and set by Capt. Eoin Deignan of CIL, who also set the sundial for the Air India Disaster Memorial, designed by Ken Thompson, on Sheep’s Head.  The time shown is ‘Local Apparent Time’ or Sun Time which can be converted to Clock Time by making allowances for three factors:

  1. Sometimes the sun is ‘slow’ or ‘fast’ and there is a table for the ‘Equation of Time’ for those days, which have to be added or subtracted.
  2. The difference in longitude between Mizen Head and Greenwich is 39½ minutes so this is always added to the dial time.
  3. One hour has to be added on for ‘Summer Time’.

The gnomon or ‘hand’ has to be read on the western age of the shadow before noon and the eastern edge after noon.

Contact Us

Mizen Head Signal Station
Mizen Tourism Co-operative Society Ltd.
Harbour Road
West Cork
Tel: +353 28 35000 or + 353 28 35115 (Summer Only)
E: info@mizenhead.ie

Opening Times

November 1st – March 16th: 11am-4pm (Weekends Only)
March 17th – May 31st: 10.30am – 5pm
June 1st – August 31st: 10am – 6pm
September 1st – October 31st: 10.30 – 5pm
June, July and August
Daily 10am-6pm
September, October 
Daily 10.30am -5pm
November -March 
Weekends 11am-4pm

Entry Prices

Adult: €7.50 | Senior/Student: €6
Child under 14: €4.50 | Child under 5: Free

Group & Family Deals
Family (2 Adults and up to 4 Children): €25
Groups (10 and over): Adults: €6.50 | Senior/Student: €5 | Child 5-14: €3.50

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