Time And Calendar | Mathematics Olympiad for Class 1 PDF Download

Introduction

Time

Time is defined as the ongoing and continuous sequence of events that occurs from past through present to future. Time is used to measure or compare the duration of different events. We can measure time in seconds, minutes, hours, days, weeks, months and years with the help of clocks and calendars.

Clock

• The clock helps us to read and measure time. There are 12 numbers written on a clock, from 1 to 12. These numbers refer to the time of the day for 12 hours.
• It has two hands. The longer hand is known as the minute hand and the shorter hand is known as the hour hand.
  

Day and Night Time

• We do many activities during the day. A day is divided into daytime and night time. Day time is from sunrise to sunset and night time is from sunset to sunrise. During the day we do many activities like we go to school, play with friends, eat and study. At night we go to sleep.
• We use AM to refer any time between 12 midnight to 12 noon and PM to refer any time between 12 noon to 12 midnight.
• Below, we can see the daily routine events of a child according to time.
  

Examples:

Reading Clock

• If long hand is pointing at 12 and short hand is pointing at 4, then we will say that the time is 4 o’clock.
  
• If the minute hand is pointing at 12 and hour hand is pointing at 6, then we will say that the time is 6 o’clock.

Calendar

• A calendar is an important tool in our day to day lives. It helps us to keep track of dates, days, weeks, months and years. It also helps us to schedule events.
  
• Have you ever wondered if there was no calendar, then how would you know on which day you were born ?
• By reading a calendar we can know what date, day, month and year it is. The current year is 2021. The calendar of 2021 is given below
  

Days

A week has seven days. Each day starts at midnight and ends at next midnight. The seven days of the week are:

• Sunday: First Day of the Week
• Monday: Second Day of the Week
• Tuesday: Third Day of the Week
• Wednesday: Fourth Day of the Week
• Thursday: Fifth Day of the Week
• Friday: Sixth Day of the Week
• Saturday: Seventh Day of the Week
  After Saturday, the week starts with Sunday again.
  If today is Wednesday, then yesterday was Tuesday and tomorrow will be Thursday.

Months

There are 12 months in a year. The 12 months of the year are:

1. January
2. February
3. March
4. April
5. May
6. June
7. July
8. August
9. September
10. October
11. November
12. December

• January, March, May, July, August, October and December have 31 days.
• April, June, September and November have 30 days.
• February have 28 days or 29 days.
• A year has 365 days.
• In leap year, a year has 366 days. A leap year comes after every four years.