Calendar

A calendar is a system o organisin days for social, releegious, commercial or admeenistrative purposes. This is duin bi giein names tae periods o time, typically days, weeks, months, an years. A date is the designation o a single, specific day within such a seestem. A calendar is a physical record (eften paper) o such a seestem an aa. A calendar can mean a leet o planned events an aa, such as a coort calendar or a pairtly or fully chronological leet o documents, such as a calendar o wills.

Periods in a calendar (such as years an months) are usually synchronised wi the cycle o the sun or the muin. The maist common kynd o pre-modren calendar wis the lunisolar calendar, a lunar calendar that whiles adds ane intercalary month tae remain synchronised wi the solar year ower the lang term.

The calendar in the maist widespread uise the day is the Gregorian calendar, introduced in the 16t century bi Pape Gregory XIII as a modification o the Julian calendar, which wis itsel a modification o the auncient Roman calendar. The term calendar itsel is taken frae calendae, the term for the first day o the month in the Roman calendar, relatit tae the verb calare "tae cry oot", referrin tae the "cryin" o the new muin when it wis first seen.^[1] Laitin calendarium meant "accoont beuk, register" (as accoonts war settled an debts war collectit on the calends o ilka month). The Laitin term wis adoptit in Auld French as calendier.