Calendars

A calendar date is a reference to a particular day represented within a calendar system.

A public transport timetable (also timetable and North American English schedule) is a document setting out information on service times, to assist passengers with planning a trip.

(See also: Detailed logarithmic timeline) A logarithmic timeline is a timeline laid out according to a logarithmic scale.

A calendar is a system of organizing days for social, religious, commercial or administrative purposes.

A leap year (also known as an intercalary year or a bissextile year) is a year containing one additional day (or, in the case of lunisolar calendars, a month) added to keep the calendar year synchronized with the astronomical or seasonal year.

A month is a unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon; month and Moon are cognates.

Quipus, sometimes known as khipus or talking knots, were recording devices historically used in a number of cultures and particularly in the region of Andean South America.

Runes (Proto-Norse: ᚱᚢᚾᛟ (runo), Old Norse: rún) are the letters in a set of related alphabets known as runic alphabets, which were used to write various Germanic languages before the adoption of the Latin alphabet and for specialised purposes thereafter.

A year is the orbital period of the Earth moving in its orbit around the Sun.

Kali Yuga (Devanāgarī: कलियुग [kəli juɡə], lit. "age of [the demon] Kali", or "age of vice") is the last of the four stages the world goes through as part of the cycle of yugas described in the Sanskrit scriptures, within the present Mahayuga.

New Year is the time at which a new calendar year begins and the calendar's year count increments by one.

In astronomy and celestial navigation, an ephemeris (plural: ephemerides; from Latin ephemeris, "diary", from Greek: ἐφημερίς, ephēmeris, "diary, journal") gives the positions of naturally occurring astronomical objects as well as artificial satellites in the sky at a given time or times.

The Iranian calendars (Persian: گاه‌شماری ایرانی‎‎ Gâhshomâriye Irâni) are a succession of calendars invented or used for over two millennia in Iran (Persia).

A solstice is an astronomical event that occurs twice each year (in June and December) as the Sun reaches its highest or lowest excursion relative to the celestial equator on the celestial sphere.

There are about twenty different texts from Qumran which deal with a 364-day solar calendar.

An academic term (or simply "term") is a portion of an academic year, the time during which an educational institution holds classes.

Nepal Era (नेपाल सम्बत Nepāl Sambat) is the national lunar calendar of Nepal.

The Enoch calendar is an ancient calendar described in the pseudepigraphal Book of Enoch.

A golden number (sometimes capitalized) is a number assigned to each year in sequence to indicate the year's position in a 19-year Metonic cycle.

1972 was proclaimed International Book Year by the United Nations and made effective by UNESCO.

The December solstice, also known as the southern solstice, is the solstice that occurs each December, typically between the 20th and the 22nd day of the month according to the Gregorian calendar.