Words for month in Celtic languages.

Proto-Celtic *mīns = month
Old Irish (Goídelc) mi = month
Irish (Gaeilge) [mʲiː] = month
an mhí seo cáite = last month
an mhí seo = this month
an mhí seo chugainn = next month
Scottish Gaelic (Gàidhlig) mìos [miəs] = month
a’ mhìos sa chaidh = last month
a’ mhìos seo = this month
an ath-mhìos = next month
Manx (Gaelg) mee [miː] = month
yn vee shoh chaie = last month
yn vee sho = this month
yn vee shoh çheet = next month
Proto-Brythonic *mis = month
Welsh (Cymraeg) mis [miːs / miːs / miːʃ] = month, oestrus
y mis diwedda(f) = last month
y mis hwn = this month
y mis nesa(f) = next month
Cornish (Kernewek) mis = month
Breton (Brezhoneg) miz = month
ar miz diwezhañ = last month
ar miz-mañ = this month
ar miz kentañ = next month

Etymology (month): possibly from the Proto-Indo-European *mḗh₁n̥s (moon, month) [source].

Words marked with a * are reconstructions.

The names of the months (and days and seasons) in Celtic languages

Months in Celtic languages

Sources: Wiktionary, Am Faclair Beag, Online Manx Dictionary,, Geiriadur Prifysgol Cymru, Gerlyver Kernewek

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