How many time zones are there?

This is a common question that people often ask when they travel across different regions of the world or communicate with someone living in a different time zone. Time zones are areas on Earth that have the same standard time. There are 24 time zones in the world, and they are defined based on the longitudinal distance from the Prime Meridian, which is an imaginary line that runs from the North Pole to the South Pole through the Royal Observatory in Greenwich, London. Each time zone is typically 15 degrees of longitude wide, with the International Date Line being the dividing line between the two consecutive calendar days.