A calendar in a dream means unpleasant surprise; remember to keep the promises you have given to someone.
buy a new calendar: a lot of joy in the near future
have a calendar: your life is well-organized
throw away the old calendar: the improvement of situation after numerous problems
read a calendar: just now you will learn about things that you should have known for a long time
look through the calendar: you will face a difficult time of your life and you will have to overcome it
destroy a calendar: you will manage to avert the danger, of which you were afraid for a long time