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Class 4 Maths Poster -2 Chapter 12 Time and Calendar

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How to Read
the Clock
O’clock
Half past
Quarter past
Quarter to
Clock Components
Hour Hand
Minute Hand
(long hand)
Numbers Ticks
When the minute hand is on 12,
the time is exactly on the hour.
Example: It is six o’clock.
When the minute hand is on 6, this
means 30 minutes past the hour.
Example: It is half past seven.
When the minute hand is on 3, this
means 15 minutes past the hour.
Example: It is quarter past six.
When the minute hand is on 9, this
means 15 minutes before the next
hour. Example: It is quarter to seven.
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FAQs on Class 4 Maths Poster -2 Chapter 12 Time and Calendar

1. What is the difference between a solar calendar and a lunar calendar?
Ans. A solar calendar is based on the Earth's revolutions around the Sun, marking a year as approximately 365.25 days. The Gregorian calendar is a common example. In contrast, a lunar calendar is based on the phases of the Moon, with each month beginning with a new moon. The Islamic calendar is an example of a lunar calendar. Because of this, lunar calendars have about 354 days in a year, leading to a shift in seasons over time.
2. How do leap years work in the Gregorian calendar?
Ans. Leap years occur every four years to help synchronize the calendar year with the solar year, which is about 365.25 days. A year is a leap year if it is divisible by 4, except for years that are divisible by 100 (unless they are also divisible by 400). For example, the year 2000 was a leap year, but 1900 was not.
3. Why is it important to understand time zones?
Ans. Understanding time zones is crucial for scheduling events, travel, and communication across different regions. The Earth is divided into 24 time zones, each typically one hour apart. This affects everything from business operations to international calls, as a time difference can result in missed appointments or misunderstandings.
4. What are the main features of the calendar system used in most countries today?
Ans. Most countries use the Gregorian calendar, which features 12 months, with varying days ranging from 28 to 31. It includes leap years, has a clear system for marking days, weeks, and months, and is widely recognized for civil purposes. It is designed to keep in sync with the seasons, making it practical for agriculture and daily life.
5. How do cultures celebrate the New Year differently based on their calendars?
Ans. Different cultures celebrate the New Year on various dates depending on their calendar systems. For instance, the Gregorian calendar marks January 1st as New Year’s Day, while the Chinese New Year follows the lunar calendar and varies each year. Similarly, the Jewish New Year, Rosh Hashanah, occurs in the fall, while the Islamic New Year is based on the lunar calendar. Each culture has unique traditions and customs associated with their New Year celebrations.
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