Longitude and Time

A place where evening occurs lately than in Greenwich is located in west longitude.

The time difference at ${180}^0$ longitude is $12$ hours.

When it is $12$ midnight in any place on earth, it indicates the end of the day and the beginning of another day.

The travellers at the movement of crossing ${180}^0$ from the east have to add up a day in their time schedule

What is the longitude of Indian Standard Time (IST)?

Explain how time and date change when one crosses the International date line? 

The local time at Greenwich, is considered as the accurate time for the Prime Meridian, and is called Greenwich Mean Time.

The time based on the Standard Meridian is called the Indian Standard Time (IST).

The time in each zone differs from the other by only one hour.

Australia has ten time zones.

A line passing through $180°$ meridian diametrically opposite to the G.M.T. is known as the International Date Line.

The time according to the position of Sun at that place is known as the Local time.

Indian Standard Time is $5$ hours and $30$ minutes ahead of G.M.T.

The whole globe is divided into $180$ time zones.

Through which city does the Standard Meridian of our country pass?

Name two countries that have five time zones.

Define the term 'Zonal time'.

Define 'Indian Standard Time'.

Define the term 'International date line'.

What is the difference between local time and standard time?