A calendar in a dream represent the passage of time in your life, or the limitations that time places upon you.
If you see a calendar in a dream, you may be worried that you will not be able to meet a deadline or complete a task on time. You may feel that things in your life are happening too quickly.
The calendar in your dream can symbolize your past or your future, depending on the dates that are shown.
A calendar that is opened to date in the past can be a sign that you are living in the past and need to change your ideas or your behavior.
If a particular date is prominent on the calendar, consider whether it has a special significance to you.