年份 (nián fèn) literally combines 年 (nián, 'year') and 份 (fèn, a measure word implying 'portion' or 'instance'), together meaning 'the specific year something was produced or occurred'. It emphasizes the year as an identifying attribute—especially for wines, teas, documents, historical events, or manufactured goods—where the year carries significance beyond simple chronology.

This term is formal and precise, commonly used in contexts requiring accuracy and authenticity: vintage wine labels, academic citations, archival records, or quality control. Unlike the more general 年 (nián), which just means 'year' in time expressions (e.g., 去年), 年份 highlights the year as a defining feature—akin to English 'vintage' for wine or 'production year' for electronics. It’s rarely used in casual speech about personal age or calendar years.