Definition of Standard Meridian
The standard meridian is a specific line of longitude that is used as a reference point for a particular region or country to establish the standard time. It plays a crucial role in the coordination of time across different geographical areas.

Importance of Standard Meridian
- **Time Zone Reference**: The standard meridian helps in defining the time zone for a region. Each time zone typically spans 15 degrees of longitude, corresponding to one hour of time difference.
- **Uniform Timekeeping**: It ensures that all places within the same time zone follow a uniform time, facilitating synchronization in activities such as business operations, transportation, and communication.

Geographical Characteristics
- **Prime Meridian**: The Prime Meridian at 0° longitude, located at Greenwich, London, serves as the reference point for the world's time zones.
- **Local Meridians**: Countries often choose their own standard meridian based on their geographical location. For example, India uses the 82.5° E meridian as its standard meridian.

Application in Daily Life
- **Time Calculation**: The standard meridian is essential for calculating local time by adding or subtracting hours from Coordinated Universal Time (UTC).
- **Navigation and Travel**: It aids pilots, sailors, and travelers in navigating and planning their routes based on time adjustments.

Conclusion
Understanding the concept of the standard meridian is vital for grasping the complexities of time zones and their significance in our interconnected world.

The meridian on earth's surface from which longitude is measured