四大历法传统：公历、农历、伊斯兰历、希伯来历

English

Every calendar is a cosmology in miniature. The choice of what to count — solar years, lunar months, or both — reflects a judgment about which celestial rhythms matter most. The choice of where to start — which historical or religious event defines the origin of time — reflects a claim about what is most significant in the human past. The four major calendar systems in use today embody four different answers to these questions, and understanding their differences is a way of understanding the civilizations that produced them.

中文

历法是宇宙观的缩影。选择以什么为计时单位——太阳年、月亮月、或两者兼用——反映了对哪种天象节律最重要的判断。选择以什么为纪元起点——以哪个历史或宗教事件定义时间原点——反映了对人类过去什么最重要的一种主张。今天仍在使用的四种主要历法体系，体现了对这些问题的四种不同回答，而理解它们的差异，就是理解产生它们的文明的方式。

The Gregorian Calendar: Solar Precision and Global Spread

公历：太阳的精确与全球传播

English
The Gregorian calendar, the global standard for commercial and administrative purposes, is a purely solar calendar: it tracks the tropical year (the time for Earth to complete one orbit around the sun) with high precision, accumulating an error of only one day approximately every 3,300 years. Its months bear no relationship to lunar phases. It was promulgated by Pope Gregory XIII in 1582 to correct the drift accumulated in the Julian calendar (established by Julius Caesar in 46 BCE).

The Gregorian calendar’s global adoption was not the result of scientific superiority alone — it was the result of European colonial and commercial expansion carrying it to every part of the world. Its epoch (Year 1) is theologically defined by the birth of Jesus Christ, though most contemporary users have forgotten this. The calendar is now genuinely global but not culturally neutral: it reflects a specific religious and historical tradition embedded in an administrative universal.

中文
公历是今天全球商业与行政通用的历法，是纯粹的阳历：它以回归年（地球绕太阳一周的时间）为基准，精度很高，约每3300年误差一天。其月份与月相无关。1582年由教皇格里高利十三世颁行，以纠正儒略历（公元前46年由凯撒颁行）积累的误差。

公历的全球普及并非仅仅因为科学上的优越性——而是欧洲殖民扩张与商业扩张将它带到了世界各地。其纪元（公元元年）在神学上以耶稣基督诞生为定义，尽管今天大多数使用者已忘记了这一点。公历如今已是真正的全球历法，但并非文化中立的：它反映了嵌入在行政普适性中的特定宗教与历史传统。

The Chinese Lunisolar Calendar: Two Rhythms, One System

中国农历：两种节律，一个体系

English
The Chinese agricultural calendar is a lunisolar system: months are defined by the lunar cycle (the synodic month of approximately 29.5 days), but intercalary months are added in a regular pattern (7 months added in every 19-year cycle) to keep the calendar aligned with the solar year. This ensures that the 24 solar terms — which divide the solar year into equal segments — always fall in the appropriate season.

The 24 solar terms (二十四节气) are the calendar’s most elegant feature: they track the sun’s position with precision and directly served agricultural planning for millennia. Qingming marks the time for spring planting; Mangzhong marks the wheat harvest; Hanlu marks the cotton harvest. The system integrates astronomical precision with agricultural practice in a way that no purely solar or purely lunar calendar can match. UNESCO inscribed the 24 solar terms on its Intangible Cultural Heritage list in 2016.

中文
中国农历是阴阳合历：月份以月相为准（朔望月，约29.5天），但通过每隔约19年增加7个闰月的规律来保持与太阳年的对齐，确保二十四节气——将太阳年等分为24段——总是落在相应的季节。

二十四节气是农历最精彩的部分：它们以精确的方式追踪太阳的位置，几千年来直接服务于农业规划。清明标志着春种时节；芒种标志着麦收；寒露标志着采棉。这一体系将天文精度与农业实践结合的方式，是纯阳历或纯阴历都无法比拟的。2016年，二十四节气被联合国教科文组织列入人类非物质文化遗产代表作名录。

The Islamic Calendar: The Moon Alone

伊斯兰历：纯粹的月亮时间

English
The Islamic Hijri calendar is the most consistently lunar of the major calendar systems: it counts 12 lunar months per year with no intercalation, producing a year of 354 or 355 days — approximately 11 days shorter than the solar year. This means Islamic calendar dates cycle through all seasons over a period of roughly 33 years.

This is a deliberate feature, not a limitation. The theological reasoning is that religious observance should not be tied to natural seasons — Ramadan fasting, the Hajj pilgrimage, and other obligations should be performed equally in summer heat and winter cold, demonstrating that faith transcends circumstance. The calendar’s epoch — 622 CE, the year of the Hijra (Muhammad’s migration from Mecca to Medina) — identifies the founding of the Muslim community (umma) as the beginning of meaningful historical time.

中文
伊斯兰历（希吉来历）是最纯粹的阴历：每年12个阴历月，不设闰月，每年354或355天，比太阳年短约11天。这意味着伊斯兰历上的日期在约33年的周期内循环经过所有季节。

这是一个有意的设计，而非局限。其神学逻辑是：宗教实践不应依赖于自然季节——斋月禁食、朝觐等义务在酷暑与寒冬中都应同样履行，以显示信仰超越环境。伊斯兰历的纪元——公元622年，穆罕默德从麦加迁徙到麦地那（希吉来）——将穆斯林社群（乌玛）的建立视为有意义的历史时间的起点。

The Hebrew Calendar: Time as Sacred Narrative

希伯来历：作为神圣叙事的时间

English
The Hebrew calendar is, like the Chinese, a lunisolar system — using the same 19-year cycle of intercalation (Metonic cycle) to synchronize lunar months with the solar year. Its epoch is the traditional date of creation, corresponding to 3761 BCE in the Gregorian calendar. Each major festival carries both astronomical and historical significance: Passover falls on the first full moon after the spring equinox and commemorates the Exodus; Yom Kippur structures an annual cycle of moral accounting. Sacred time is not separate from historical time — the calendar enacts the entire narrative of divine-human relationship in its annual cycle.

中文
希伯来历与中国农历一样，是阴阳合历——使用相同的19年置闰周期（默冬章）来使农历月与太阳年同步。其纪元是传统的创世年，对应公历公元前3761年。每一个主要节日都兼具天文与历史意义：逾越节在春分后第一个满月之后，纪念出埃及；赎罪日构成了年度道德清算的周期。神圣时间与历史时间并非分离——历法在其年度循环中演绎着神-人关系的整个叙事。

Living in Multiple Calendars

生活在多种历法中

English
Most people on earth today live simultaneously in multiple calendar systems: the Gregorian for work and international transactions, a lunar or lunisolar calendar for cultural and family observance, and possibly a religious calendar for spiritual practice. A Chinese family celebrating the Spring Festival, a Muslim observing Ramadan, and a Jewish community keeping Shabbat are all, simultaneously, users of the Gregorian calendar for their professional lives.

This multiplicity is not confusion — it is a practical accommodation of the reality that human time has multiple dimensions: astronomical, agricultural, religious, historical, and administrative. The question of which calendar is the right one may be less interesting than the question of what each one reveals about what its users consider worth counting.

中文
今天，大多数人同时生活在多个历法体系中：公历用于工作和国际事务，阴历或阴阳合历用于文化与传统活动，还可能使用宗教历法进行精神实践。一个庆祝春节的中国家庭、一个守斋月的穆斯林、一个守安息日的犹太社群——他们同时都在职业生涯中使用公历。

这种多重性不是混乱——它是人类时间具有多个维度（天文、农业、宗教、历史、行政）这一现实的务实适应。哪个历法才是“正确”的，这个问题可能不如每个历法揭示了其使用者认为什么值得计数来得有趣。

Four Calendar Traditions – Gregorian, Chinese, Islamic, Hebrew 四大历法传统：公历、农历、伊斯兰历、希伯来历