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  2. Besançon astronomical clock - Wikipedia

    en.wikipedia.org/wiki/Besançon_astronomical_clock

    The dials showing the civil calendar show the month, date, day, the solar element that gave its name to the day of the week (e.g., the sun for Sunday), the season, the sign of the Zodiac, the length of the day, the length of the night, the seconds, and the times for sunrise and sunset.

  3. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    The above relation implies that on the same day, the lengths of daytime from sunrise to sunset at and sum to 24 hours if =, and this also applies to regions where polar days and polar nights occur. This further suggests that the global average of length of daytime on any given day is 12 hours without considering the effect of atmospheric ...

  4. Equinox - Wikipedia

    en.wikipedia.org/wiki/Equinox

    The times of sunset and sunrise vary with the observer's location (longitude and latitude), so the dates when day and night are equal also depend upon the observer's location. A third correction for the visual observation of a sunrise (or sunset) is the angle between the apparent horizon as seen by an observer and the geometric (or sensible ...

  5. Planetary hours - Wikipedia

    en.wikipedia.org/wiki/Planetary_hours

    A table of hours is shown for a sequence of seven days, with the day of the week indicated both for the sunrise (hour 1) and the sunset (hour 13) naming conventions. Day hours are calculated by adding up the amount of minutes from sunrise and sunset, then dividing by 12.

  6. Sunset - Wikipedia

    en.wikipedia.org/wiki/Sunset

    Calculate the sunset time, which is the solar noon time plus the sunset hour angle in degree divided by 15; Use the sunset time as input to the solar geometry routine to get the solar azimuth angle at sunset. An interesting feature in the figure on the right is apparent hemispheric symmetry in regions where daily sunrise and sunset actually occur.

  7. Calendar (stationery) - Wikipedia

    en.wikipedia.org/wiki/Calendar_(stationery)

    A 2007 wall calendar with moveable date marker. A calendar is used to display dates and related information, usually in a table format. Calendars are used to plan future events and keep track of appointments, and so a typical calendar will include days of the week, week numbering, months, public holidays and clock changes. [1]

  8. Solar calendar - Wikipedia

    en.wikipedia.org/wiki/Solar_calendar

    The Islamic calendar is a purely lunar calendar and has a year, whose start drifts through the seasons and so is not a solar calendar. The Maya Tzolkin calendar, which follows a 260-day cycle, has no year, therefore it is not a solar calendar.

  9. Hindu calendar - Wikipedia

    en.wikipedia.org/wiki/Hindu_calendar

    Of the various regional calendars, the most studied and known Hindu calendars are the Shalivahana Shaka (Based on the King Shalivahana, also the Indian national calendar) found in the Deccan region of Southern India and the Vikram Samvat (Bikrami) found in Nepal and the North and Central regions of India – both of which emphasize the lunar ...