Introduction to Calendars

A calendar is a system for organizing days for social, religious, commercial, or administrative purposes. It is a way of measuring time in units such as days, months, and years. The most common calendar in use today is the Gregorian calendar.

Days of the Week

The days of the week are Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday. These days are arranged in a recurring cycle, with Sunday usually considered the first day of the week.

Months of the Year

The Gregorian calendar consists of 12 months: January, February, March, April, May, June, July, August, September, October, November, and December. These months have varying numbers of days, with February being the shortest month with 28 or 29 days in leap years.

Years and Leap Years

A year in the Gregorian calendar consists of 365 days, except for leap years which have 366 days. Leap years occur every 4 years, with an extra day added to the month of February.

Study Guide

1. What are the days of the week?
2. How many months are there in a year?
3. What is a leap year and how often does it occur?

[Calendar] Related Worksheets and Study Guides:

• Time and CalendarESL-Spanish • Grades 3-5