Calendar

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calendar

Online Calendar

A calendar is a system people use to organize, measure, and keep track of time. It divides time into units such as days, weeks, months, and years. Calendars are important for planning daily life, marking festivals, scheduling events, and recording history.

The most widely used calendar today is the Gregorian calendar, introduced in 1582, which has 12 months and 365 days in a year (366 in a leap year). Other cultures also have their own calendars, such as the Islamic (Hijri) calendar, Hindu calendar, and Chinese lunar calendar.

Calendars help societies coordinate activities, manage work and holidays, and understand the passage of time across generations.

Frequently asked questions about Calendar

  • How many months are in a year?

    12 months.

  • How many days are in a year?

    365 days in a common year, 366 days in a leap year.

  • What is a leap year?

    A leap year is a year with 366 days, occurring every 4 years, when February has 29 days.

  • How many weeks are in a year?

    52 weeks and 1 day (or 2 days in a leap year).

  • Who introduced the Gregorian calendar?

    Pope Gregory XIII in 1582.

  • How many days are in each month?

    January – 31
    February – 28/29
    March – 31
    April – 30
    May – 31
    June – 30
    July – 31
    August – 31
    September – 30
    October – 31
    November – 30
    December – 31

  • How many months have 30 days?

    Four months: April, June, September, November.

  • How many months have 31 days?

    Seven months: January, March, May, July, August, October, December.

  • Which month has the least days?

    February.