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Calendar Chapter Notes | Mental Maths - Class 1

Why do we need a Calendar?

A calendar is a system used to organize and record time, typically based on the cycles of the Earth's movements, such as the rotation of the Earth on its axis and its orbit around the Sun. 

  • Calendars help us keep track of days, weeks, months, and years, allowing us to plan and schedule events, religious observances, agricultural activities, and more. 
  • Calendar is a table showing the days, weeks and months of a year. 
  • It displays all the dates and days of the week. There are 7 days in a week.

Days of Week in Order:

  • Monday is the first day of the week and Sunday is the last day of the week.
  • There are 12 months in a year.
  • There are 365 days in an ordinary year and the month of February has 28 days. But every fourth year, February has 29 days and the year has 366 days. It is called a leap year.
  • The calendar given below shows the months of the year in order:

Calendar 2024

  • Months are also identified by their position in the year
  • All the months do not have equal number of days. Some have 30, some have 31 and one month has even less.


    Calendar Chapter Notes | Mental Maths - Class 1Calendar Chapter Notes | Mental Maths - Class 1

Month having 28 or 29 days is February

Question for Chapter Notes - Calendar
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What is the purpose of a calendar?
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Writing a Date

  • A calendar date helps us to identify a specific day represented within the calendar.
    For example: The first Monday of January 2019 as given in the calendar for 2019 is identified as 
  • 7th January 2019 which can be written in short form as 7/01/2019 or 07-01-2019 or 07.01.2019, where 01 represents the month number, 2019 the year and 07 the day of the month.
  • The format can be written generally as: dd/mm/yyyy, where dd– day, mm– month, yyyy– year 
  • Let us see what the date on the third Sunday of August 2019 is? 
    The day on the third Sunday is 18. The month number is 08 and the year is 2019.
    ∴ Required date is 18/08/2019 or 18.08.2019.

A calendar helps us to know about days, weeks, months and year.

Calendar Chapter Notes | Mental Maths - Class 1

We read the calendar to tell the days and dates.

Historical Preview

  • In previous time, people used to tell time by looking at the sun’s shadow.
  • People used to meet at down, when the sun came up, or at noon, when the sun was highest in the sky, or at sunset, when the sun went down.
  • The time from one new moon to another was a month, and the time from one spring to the next was a year.

For example, 15th January 2024 falls on Monday.

Calendar Chapter Notes | Mental Maths - Class 1

A date is written in the following ways:

  • Date/month/year e.g. 15/01/2024                                Or
  • Date-month-year e.g. 15-01-2024                                Or
  • Date month' year e.g. 15+th January' 2024

Now try writing your birth date in your notebook using different formats.

Question for Chapter Notes - Calendar
Try yourself:
What is the purpose of a calendar?
View Solution

READING A CALENDAR

Find the date

find the day on which the date is falling

Month and year is given at the top

Combine all of them in the form: date/month/year

 

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FAQs on Calendar Chapter Notes - Mental Maths - Class 1

1. Why do we need a calendar?
Ans. A calendar is a useful tool for organizing and keeping track of time. It helps us plan our schedules, appointments, and events. Additionally, a calendar helps us stay aware of important dates, such as holidays, birthdays, and deadlines.
2. What is the significance of the Calendar 2024?
Ans. The Calendar 2024 is significant because it provides a specific year's worth of dates, months, and days. It allows individuals and organizations to plan and schedule activities for that year, ensuring they are aware of important events, holidays, and deadlines specific to 2024.
3. How do you write a date correctly?
Ans. To write a date correctly, the most common format is to start with the day, followed by the month and year. For example, if the date is January 15, 2024, it would be written as "15th January 2024" or "January 15, 2024." However, different regions and cultures may have variations in date formats.
4. What is the Historical Preview chapter about?
Ans. The Historical Preview chapter provides a summary or overview of the evolution and significance of calendars throughout history. It may cover topics such as the development of different calendar systems, the importance of calendars in ancient civilizations, and how calendars have evolved over time.
5. How can I take notes on the calendar article?
Ans. To take notes on the calendar article, you can use various methods. You can highlight or underline important information directly on the article if it is in a physical format. If the article is digital, you can use note-taking apps or software to jot down key points. Another option is to create a separate document or notebook where you summarize the main ideas and key details from the article.
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