Calendars and Concepts of Time
General resources on solar, lunar, and stellar calendars, and measurement of time.
Intercalation
Intercalation is a term referring to insertion into a calendar.
Intercalation is a term referring to insertion into a calendar.
A.D. Anno Domini A.D.
A.D. is a Latin abbreviation for Anno Domini.
A.D. is a Latin abbreviation for Anno Domini.
Calendar
Births, deaths, festivals, and other significant events from antiquity -- approximately -- since we use a different calendar from the ones used by the Greeks and Egyptians, and a modified version of the one used by the Romans.
March was the first month of the ancient Roman religious calendar. The month of March was sacred to the god Mars, father of the founder of Rome, Romulus.
Births, deaths, festivals, and other significant events from antiquity -- approximately -- since we use a different calendar from the ones used by the Greeks and Egyptians, and a modified version of the one used by the Romans.
March was the first month of the ancient Roman religious calendar. The month of March was sacred to the god Mars, father of the founder of Rome, Romulus.
Jewish Calendar Months
Names of the months of the Jewish calendar.
Names of the months of the Jewish calendar.
Ides, Kalends, Nones, and Pridie
The terminology used to divide the month in three parts was based on the first three lunar phases.
The terminology used to divide the month in three parts was based on the first three lunar phases.
Ancient Calendar
Your Guide's feature on the early calendar; problems of equating lunar with solar time.
Your Guide's feature on the early calendar; problems of equating lunar with solar time.
Two Jewish New Years
The Hebrew calendar is different from the Gregorian in that it is lunisolar and honors both a religious and a secular new year.
The Hebrew calendar is different from the Gregorian in that it is lunisolar and honors both a religious and a secular new year.
The Calendar
Lists the names for the Chinese years, compares the months in the Gregorian, Jewish, Islamic, and Hindu systems.
Lists the names for the Chinese years, compares the months in the Gregorian, Jewish, Islamic, and Hindu systems.
Calendars and Their History
By L. E. Doggett, reprinted from the Explanatory Supplement to the Astronomical Almanac.
By L. E. Doggett, reprinted from the Explanatory Supplement to the Astronomical Almanac.
A Walk Through Time
Ancient calendars, early clocks, and world time scales from the National Institute of Standards and Technology.
Ancient calendars, early clocks, and world time scales from the National Institute of Standards and Technology.