Changes

[[File:De Ricci Coligny 1926 detail month14.jpeg|left|150px|Part of the Coligny calendar. This Celtic calendar was discovered in Coligny France in 1897]]The Irish adopted the Julian calendar around AD 450. Significant dates may have transferred from the Celtic calendar. A Celtic lunisolar calendar has been reconstructed from fragments of two second century calendars, one found in the French town of Coligny and the other in Villards d'Heria. The first month on this calendar is called ''Samonios''. This month is cognate with Samhain and contained the winter solstice.<ref name="Olmsted">Olmsted, Garrett (1992). ''The Gaulish calendar: a reconstruction from the bronze fragments from Coligny, with an analysis of its function as a highly accurate lunar-solar predictor, as well as an explanation of its terminology and development,'' p. 193.</ref>

[[File:De Ricci Coligny 1926 detail month14.jpeg|left|150px|Part of the Coligny calendar. This Celtic calendar was discovered in Coligny France in 1897]]The Irish adopted the Julian calendar around AD 450. Significant dates may have transferred from the Celtic calendar. A Celtic lunisolar calendar has been reconstructed from fragments of two second century calendars, one found in the French town of Coligny and the other in Villards d'Heria. The first month on this calendar is called ''Samonios''. This month is cognate with Samhain and contained the winter solstice.<ref name="Olmsted">Olmsted, Garrett (1992). ''The Gaulish calendar: a reconstruction from the bronze fragments from Coligny, with an analysis of its function as a highly accurate lunar-solar predictor, as well as an explanation of its terminology and development,'' p. 193.</ref>

With a leap day every five years, the Coligny calendar gives the length of a solar year as 365.20 days. Since the true length is 365.2422 days, the calendar drifts by one day every 23.7 years. If Samhain was once a month that contained the winter solstice (December 21), it had drifted by AD 450 so that it corresponded roughly to November. This suggests that the Celtic calendar was in use for about 1,300 years.<ref name="Olmsted"/>

With a leap day every five years, the Coligny calendar gives the length of a solar year as 365.20 days. Since the true length is 365.2422 days, the calendar drifts by one day every 23.7 years. Samhain was at one time a month that contained the winter solstice (December 21). By the time the Julian calendar was adopted, it had drifted so that it corresponded roughly to November. This suggests that the Celtic calendar was in use for about 1,300 years.<ref name="Olmsted"/>

====Bonfires====

====Bonfires====