What does 暦 mean?
暦 is a Japanese noun meaning “calendar” or “almanac” in English. It is written as 暦 in kanji, こよみ in hiragana, and koyomi in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
母方の祖父は明日還暦を迎える。
My grandfather on my mother's side is celebrating his 60th birthday tomorrow.