What is a calendar year?

A calendar year is a period of 365 days or 366 days (in case of a leap year) beginning on January 1st and ending on December 31st. It is used to measure time and mark important events, holidays, and anniversaries. The Gregorian calendar, which is the most widely used calendar in the world, has been in use since its introduction by Pope Gregory XIII in 1582. The calendar year is divided into twelve months, each with a varying number of days, ranging from 28 to 31. The first day of the week can vary depending on cultural and religious practices, with some countries starting the week on Sunday and others on Monday. The calendar year is used for many purposes, such as business planning, tax reporting, and official documentation. Some notable holidays and events that fall within the calendar year include New Year’s Day, Easter, Independence Day, Thanksgiving, Christmas, and many more.