civil calendar

A civil calendar is a system used for organizing and measuring time in a society, primarily for civil purposes like business, education, and daily life. The most widely used civil calendar is the Gregorian calendar, established in 1582, which has 12 months and a year length of 365 days, with an extra day added every four years (leap year). This calendar helps people coordinate events, holidays, and schedules, facilitating social and economic activities. Civil calendars may vary by country, reflecting local traditions and cultural practices alongside the standardized format for global communication.