Time Zones are determined by a country’s longitudinal position on the globe – the longitude passing through Greenwich is 0, and for every subsequent longitude, 4 minutes is added to the Greenwich Mean Time. Theoretically, therefore, a nation will have multiple time zones, however, for practical purposes, countries usually fix a single mean time.
Yet, there are aberrations to this rule, with many nations having multiple time zones. Check this infographic for countries with the most time zones, and their rationale. For example, why does France have 12 time zones, while vast Canada has only 6?
Which Countries Have The Most Time Zones?
Infographic by – Statista