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'''Samhain''', Old Irish ''Samain,'' was a Celtic holiday prominent in Irish mythology. It was observed on November 1. This is also the date of [[All Saints' Day]], although the two holidays may have developed separately. Popular history associates Samhain with [[Halloween]], although Halloween arose in 18th century Scotland. In modern Gaelic, ''Samhain'' refers, not to this holiday, but to the month of November.<ref>Mark, Colin, ''The Gaelic–English Dictionary'' (2003).</ref>

'''Samhain''', Old Irish ''Samain,'' was a Celtic holiday prominent in Irish mythology. It was observed on November 1. This is also the date of [[All Saints' Day]], a closely associated holiday. Popular history associates Samhain with [[Halloween]], although Halloween arose separately in 18th century Scotland. In modern Gaelic, ''Samhain'' refers to the month of November.<ref>Mark, Colin, ''The Gaelic–English Dictionary'' (2003).</ref>

The Celtic year was divided into halves by the holidays Samhain and Beltaine (May 1). These dates were once part of a Celtic lunisolar calendar. Even in the earliest surviving accounts, both dates have already transferred to the Julian calendar.

The Celtic year was divided into halves by the holidays Samhain and Beltaine (May 1). These dates were once part of a Celtic lunisolar calendar. Even in the earliest surviving accounts, both dates have already transferred to the Julian calendar.