If you have always wanted to visit a certain place, you should plan your holiday when there aren’t big happenings in the area and when the low season takes place. For example, if you plan to visit Rome next year, you are definitely to avoid going to Rome near June 12, as the Euro 2020 opening match between Italy and Turkey is scheduled. Also, from June 12 onwards until July you are recommended to omit the other 12 cities and countries which participate in the competition unless you are a football fan, of course.
Or, if you plan to go to some popular holiday destinations like Turkey, Greece and Spain, you are advised to book well in advance, at least… What’s more, such countries are pleasantly warm and not quite busy in the preseason, which is the first half of June or even the end of May.