NCERT Solutions for Class 4th Maths Chapter 12 Ticking Clocks and Turning Calendar
Updated on 2026-09-19
About this chapter
Most years have 365 days. A leap year has 366 days, because February gets 29 days instead of 28. Leap years come after every four years — 2016, 2020, 2024, 2028, 2032, 2036. A week has 7 days, so the same weekday comes back after 7 days, 14 days and 21 days. A date written as DD/MM/YYYY tells the day, the month and the year: 04/07/2024 is 4 July 2024. A day has 24 hours — 12 hours from 6 o’clock morning to 6 o’clock evening, and 12 more till the next morning. AM is used from midnight to noon and PM from noon to midnight. A digital clock shows 1:00 PM as 13:00 hours. 1 hour = 60 minutes, half an hour = 30 minutes, a quarter hour = 15 minutes, three quarters = 45 minutes. On a clock the short thick hand shows the hour and the long thin hand shows the minutes.
- Ticking Clocks and Turning Calendar
- Names of the months in other calendars
- How many hours in a day?
- AM and PM
- Hours and minutes
- Observe the shaded portions
- How much time do you take?
- Reading time from a clock
Quick revision
| Idea | What it means | Example from the chapter | Remember this |
|---|---|---|---|
| Leap year | A year in which February has 29 days | Parv was born on 29 February 2016 | Comes after every 4 years |
| Days in a year | Ordinary year 365, leap year 366 | Feb 2024 had 29 days, Feb 2025 had 28 | 365 + 1 = 366 |
| Date form | DD/MM/YYYY — day, month, year | 04/07/2024 | Read as 4 July 2024 |
| Same weekday | Comes back after 7 days | July 1 Monday, July 8 Monday, July 15 Monday | Keep adding 7 |
| Hours in a day | 24 hours in one full day | 6 o’clock morning to 6 o’clock evening is 12 hours | 12 + 12 = 24 |
| AM | Midnight to noon | 8:00 AM = 08:00 hours | Morning times |
| PM | Noon to midnight | 8:00 PM = 20:00 hours | Add 12 to the hour |
| 1 hour | 60 minutes | 8:00 AM to 9:00 AM | Minute hand goes once round |
| Half hour | 30 minutes | 8:00 to 8:30 | Half of 60 |
| Quarter hour | 15 minutes | 8:20 to 8:35 | 60 in 4 equal parts |
| Three quarters | 45 minutes | 4:15 PM + 45 min = 5:00 PM | 15 + 15 + 15 |
| Clock hands | Short hand = hour, long hand = minutes | Long hand on 12, short hand on 4 is 4:00 | Count minutes in fives |
Exercises
- Ticking Clocks and Turning Calendar — Let Us Do Page 175 – 177
- Names of the months in other calendars — Let Us Explore Page 177
- How many hours in a day? — In-text Questions Page 178
- AM and PM — In-text Questions Page 179 – 180
- Hours and minutes — In-text Questions Page 181
- Hours and minutes — Let Us Do Page 181 – 182
- Observe the shaded portions — In-text Questions Page 182
- How much time do you take? — In-text Questions Page 183
- Reading time from a clock — Let Us Check Page 183