🌍 What Is International Time Zone?

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⏰ Why do we need time zones?

• Earth is round 🌍
• It takes 24 hours to rotate once
• When it is day in one place, it is night in another

👉 So, the world is divided into time zones

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🕒 What is a time zone?

A time zone is an area of Earth where everyone uses the same clock time.

• The Earth has 24 main time zones
• Each zone is about 1 hour apart

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🧭 What is the International Time Zone reference?

The world uses a main reference line called:

🌐 Greenwich Mean Time (GMT)

(or UTC – Coordinated Universal Time)

• It passes through Greenwich, England 🇬🇧
• All countries set their time ahead (+) or behind (–) UTC

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➕ ➖ Examples

• India: UTC +5:30
• USA (New York): UTC –5
• Japan: UTC +9

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🌍 International Date Line

• On the opposite side of Earth
• When you cross it:
  • The date changes 📅

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🧠 Easy way to remember

Earth turns → Sun moves across the sky → Different places need different times

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🌟 Fun facts for kids

• China uses one time zone for the whole country!
• Some places use half-hour time zones (like India)
• Astronauts use UTC in space 🚀

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📌 One-line summary

International time zones divide Earth into parts so people around the world can tell time correctly.

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