
1) Theatre in Ireland 2) Work by WB Yeats
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https://www.crosswordclues.com/clue/samhain

Samhain (pronounced n {Respell|SAH|win} or n {Respell|SOW|in} sˠaunʲ) is a Gaelic festival marking the end of the harvest season and the beginning of winter or the `darker half` of the year. It is celebrated from sunset on 31 October to sunset on 1 November, which is nearly halfway between the autumn equinox and the winter solstice. Along with.....
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http://en.wikipedia.org/wiki/Samhain
[software] Samhain is an integrity checker and host intrusion detection system that can be used on single hosts as well as large, UNIX-based networks. It supports central monitoring as well as powerful (and new) stealth features to run undetected in memory, using steganography. ==Main features== ...
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http://en.wikipedia.org/wiki/Samhain_(software)

(Celtic: `End of Summer`), one of the most important and sinister calendar festivals of the Celtic year. At Samhain, held on November 1, the world of ... [2 related articles]
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http://www.britannica.com/eb/a-z/s/18

One of the Wiccan eight holy days; celebrated on October 31st of each year. We now know also as Halloween.
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http://www.encyclo.co.uk/visitor-contributions.php

Samhain was the Celtic new year, November the 1st.
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http://www.probertencyclopaedia.com/browse/D3.HTM
No exact match found.