Holocene Era; Human Era
A calendar year numbering system that adds 10,000 to the Gregorian year, placing the start near the beginning of the Holocene geological epoch. Used in some academic and environmental contexts.
In the Holocene Era, the year 2025 CE becomes 12025 HE.
西暦 is the standard Gregorian calendar era (Anno Domini), while 人類紀元 is an alternative system adding 10,000 years.
From 人類 (humanity) + 紀元 (era). A modern coinage for the Holocene Era calendar system, likely a calque of the English term.