How many time zones and why are they?

Recently, my friends and I gathered at a bar and the question arose why time zones are needed and how many there are in general. We argued for a very long time. We decided to discuss this again at the next meeting. Now I am looking for information about this.

I know a bit about this topic and can tell you that Pacific Standard Time is the time zone used in parts of Canada, the United States, and the United States. This is the standard time used during the winter season. Ideally, the months following the PST are from the beginning of November each year to the middle of the next year. In winter, the standard time is 8 hours behind UTC. If you want to know more, visit this source and read interesting articles.