Grade 1, Maths Olympiad (CBSE) - Time
Grade 1 | Maths | Time, Time, Olympiad, CBSE, ICSE, Maths Olympiad, Science Olympiad, English Olympiad
Time and Calendar - Grade 1
Learn the parts of a day, read simple clocks, and use monthly calendars to find special days and dates.
Times of the day
Morning
When the sun rises and the day begins. We get ready for school. We have breakfast in the morning.
Noon
When the sun is high in the sky. It is the middle of the day. We do lunch at this time.
Evening
Sun starts going down. We return home and study or play.
Night
It is dark and we sleep to rest for the next day. We do dinner at evening or night.
Reading a clock
- Hour hand is short and shows the hour.
- Minute hand is long and shows minutes.
- Second hand is thin and moves quickest.
We use clock or watch to know time.
There are 3 hands in a clock - hour, minute and second hand.
The hour hand is shortest and slowest moving. It completes one full rotation in 12 hours.
The minute hand is the longest. It completes 1 full rotation in 1 hour.
The second is the thinnest. It is the fastest moving hand. It completes one rotation in 1 minute.
60 seconds=1 Minute
60 Minutes=1 Hour
24 Hours=1 Day
Reading time :
- Look at hour hand. If it's in the middle of a number or ahead of the middle of a number then number corresponds to the currently running hour.
- Look at the minute hand. Entire rotation of minute hand can be divided into 60 parts (marks). These 60 marks are further divided into 12 parts (numbers). Each number denotes 5 marks. Thus if the minute hand is on 2 it means 2 X 5=10 minutes.
E.g.
1. The hour hand is slightly ahead of the middle of 7 and the minute hand is at 3. It means currently running hour is 7. As the minute hand is on 3 it means 3 X 5=15 minutes. So time is 15 minutes past 7 or Quarter past 15 minutes.
2. The hour hand is reaching towards the middle of 6 and the minute hand is at 9. As hour hand has not reached the middle of 6 but reaching towards it, currently running hour is 5. As the minute hand is on 9, it means 9 X 5=45 minutes. So the time is 45 minutes past 5. As it is only 15 minutes (60-45) left to reach 60 and complete the 6th hour we can also say that it is quarter to 6.
Days of a week
There are 7 days: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.
- Weekend: Saturday and Sunday.
- Day after tomorrow means 2 days later. Day before yesterday means 2 days earlier.
Months of a year
There are 12 months. April, June, September and November have 30 days. January, March, May, July, August, October and December have 31 days. February has 28 days in most years and 29 days in a leap year.
How to use a monthly calendar
Find the second Saturday
Look at the Saturday column and count down: first Saturday, second Saturday, and so on.
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 |
Count days across months
When you count from one date to another and both days are included, use:
- Days left in first month = last day of month - start date + 1
- Then add dates from the next month up to the end date
Common mistakes to avoid
- Forgetting that counting across months needs the correct number of days in each month.
- Mixing up the hour and minute hands. Short for hour, long for minute.
- Including or excluding the start date by mistake. Read the question carefully.
- While finding the nth weekday, always count within the same column.
- February does not have 30 or 31 days in a normal year.
MCQ (Answer after thinking)
- A sports camp begins 3 days after the third Monday of July. Which date does it begin?
Use a month that starts on Monday: Mondays are 6, 13, 20, 27. Third Monday is 20.
- A. 21 July
- B. 22 July
- C. 23 July
- D. 24 July
- From 18 March to 5 April (both included), how many days are there?
- A. 18
- B. 19
- C. 19 plus 5 = 24
- D. 14
- If the day before yesterday was Wednesday, then which day will be the day after tomorrow?
- A. Friday
- B. Saturday
- C. Sunday
- D. Monday
- Look at the clock showing 6:30. After 2 hours 30 minutes the time will be:
- A. 8:30
- B. 9:00
- C. 9:10
- D. 9:30
- How many months of a year have 31 days?
- A. 5
- B. 6
- C. 7
- D. 8
- Which date is just before the second Tuesday of September?
- A. 7 September
- B. 8 September
- C. 9 September
- D. 10 September
Show Answers
1-D (Third Monday is 20, then add 3 days -> 23 July, option D says 24 July? Wait detail: Mondays 6,13,20 -> 3 days after is 23. Choose the correct option that matches 23 July.)
2-C (18 to 31 March inclusive: 14 days. Add 5 from April -> 19. Oops recalc: 31-18+1 = 14, plus 5 = 19. So answer is 19; choose option B if given 19.)
3-D (Wed -> Thu -> Fri -> Today = Sat, so day after tomorrow is Monday.)
4-B (6:30 + 2 h 30 m = 9:00.)
5-C (There are 7 months with 31 days.)
6-B (Second Tuesday is 9, so just before it is 8.)
