With the recent “Spring ahead” in time taking place in many places, the topic of Daylight Savings has been a hot one lately. And so, in order to help clarify what time it is around the World here’s a handy Time Zone Map
Time Zone Map (Source: Time and Date)
The map is divided into 24 main time zones. Each time zone is defined by the current time difference – or offset – from Coordinated Universal Time (UTC), shown in whole hours at the bottom of the map. Example: +3 means that the time zone is 3 hours ahead of UTC. On land, time zones are represented by areas of different colors, in international waters by blue and white columns. The time difference between each time zone is usually one hour, except in the diagonally striped areas, where it can be half hours or even quarter hours. For example, India is 5:30 hours ahead of UTC.
Have a look at the time zone information page for an explanation on how the boundaries are defined and why they are used. See also this brief history of time zones.