Leap week calendar week calendars would synchronize with the Gregorian every 400 years Note that the new years of the calendars shown need not be synchronised. The years according to ISO week date applied to months, i.e. a month has as many weeks as it has Thursdays, are shown depending on the weekday of 1 January, shaded weeks belong to the month they are labeled with in regular years and to the other adjoining one in leap years. Leap week calendar A leap week calendar is a calendar system with a whole number of weeks every year, and with every year starting on
Calendar (stationery) Calendar (stationery) 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. Printed calendars also often contain additional information relevant for specific groups – for instance, a Christian liturgical calendar will show holy days and liturgical colours, while a calendar for amateur astronomers will highlight phases of the moon, conjunctions and eclipses. Alongside their practical uses, calendars have taken on a decorative purpose, offering