Answer
When the exact date is not known
Explanation
In history, when the exact or accurate date of an event is not known, but there is an idea about the approximate time period, the Latin word 'Circa' (abbreviated as Ca. or C.) is used before the date. It means 'approximately' or 'around'.
Key Points
- > Circa is a Latin word.
- > The Vedic Culture Period is denoted as C. 1500 BC - 600 BC because its exact start is unknown.
- > It is mostly used for archaeological findings or ancient history.
- > In the time glossary, 'Decade' means 10 years.
- > Mathematically: \( 1 \text{ Century} = 100 \text{ Years} \).
- > \( 1 \text{ Millennium} = 1000 \text{ Years} \).
- > By using Circa, historians acknowledge the limitation of available data.
Additional Information
Time Glossary
| Term | Meaning (Duration) | Example |
|---|---|---|
| Decade | 10 years | 1901-1910 (1st decade) |
| Century | 100 years | 20th Century (1901-2000) |
| Millennium | 1000 years | 2000-2999 |
| Circa (C.) | Approximate time | C. 1500 BC |
Memory Tips
- The word Circa is like a Circle, indicating the approximate area around a point rather than the exact point itself.