jan
1月
解説 Definition
jan は January（1月）の略語です。日付表記や予定表などで、月名を短く書くときに使われます。
Jan is a written abbreviation for January, the first month of the year. It is used mainly in calendars, schedules, tables, and compact date formats, and is normally written with an initial capital letter.
覚え方のコツ Memory Tip
jan は January の先頭3文字を取った月名略語で、予定表や日付欄など、短く記す場面で使います。正式な英語表記では通常 Jan. または Jan と大文字で書き、Jan 5 のように日付と組み合わせます。「年の入口」を司る Janus に由来する January と一緒に覚えると定着します。
Remember Jan as the first three letters of January, not as a separate month name. It commonly appears where space is limited, such as calendars, schedules, forms, and dates like Jan 5. In standard writing, capitalize it as Jan; a period may be added as Jan. depending on the style guide. The connection with Janus, the Roman god associated with doorways and beginnings, also helps: January stands at the doorway of the new year, and Jan is simply its compact written form.
例文
The meeting is on jan 5.
会議は1月5日です。
My calendar starts with jan.
私のカレンダーは1月から始まります。
Please write jan at the top of the page.
ページの上に1月と書いてください。
jan の類義語・関連語
jan の語源・成り立ち Etymology
jan は January の短縮形です。January はラテン語 Ianuarius に由来し、出入り口や始まりを司るローマ神 Janus の月を意味しました。年の“入口”にあたる月なので1月となり、jan もその省略として使われます。関連語は January, Janus。
Jan is formed by shortening January to its first three letters. January ultimately comes through Latin Ianuarius, meaning the month associated with Janus, the Roman god of doorways, transitions, and beginnings. As January became the first month of the year, its association with beginnings was especially fitting. The lowercase spelling jan may occur informally, although standard English normally uses Jan or Jan.
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