Almanac: Timelines and Calendars
ICSE · Class 4 · Social Science
Summary of Almanac: Timelines and Calendars for ICSE Class 4 Social Science. Key concepts, important points, and chapter overview.
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Overview
Time helps us understand when events happen. In history and daily life, we use tools like timelines and calendars to organize events. This chapter teaches us how to arrange events in order, understand different calendars like the Gregorian and Saka calendars, and learn special terms for time periods
Key Concepts
A timeline is a line
A timeline is a line that shows events in order from the earliest to the latest. It helps us understand what happened first and what came after.
BC means 'Before Christ' and BCE
BC means 'Before Christ' and BCE means 'Before Common Era'. AD means 'Anno Domini' and CE means 'Common Era'. Years before Jesus was born are counted
This is the most commonly used
This is the most commonly used calendar in the world. It has 12 months, 365 days, and a leap year every 4 years. Century years are leap years only if
This is India’s national calendar
This is India’s national calendar. It starts with the month Chaitra (March 22). It is a lunisolar calendar — based on both the moon and the sun.
10 years = decade
10 years = decade, 100 years = century, 1000 years = millennium. For example, 2001–2100 is the 21st century.
Learning Objectives
- Differentiate between the Gregorian and Saka calendars
- Draw a timeline and mark AD (CE) and BC (BCE) on it
- Sequence events and mark them on a timeline
- Identify and mark important dates on the school calendar
- Understand special terms for time periods like decade, century, and millennium
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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