era name

era name (plural era names)

1. The regnal year, reign period, or regnal title used when traditionally numbering years in an emperor's reign and naming certain Sinospheric rulers.
   • 2000, Endymion Wilkinson, “Geography”, in Chinese History: A New Manual‎^[1], Rev. & enl. edition, Harvard University Press, →ISBN, →LCCN, →OCLC, page 135:

     Cities were not infrequently named after the era name in which they were founded (e.g., Shaoxing 紹興 in Zhejiang, after the Shaoxing era, 1131-62).