To dream that you are having a holiday means that you are lacking the time for yourself. Perhaps you are very tired, therefore the subconscious mind of yours is sending the massage to take the break. There is also a possibility that you are trying to avoid some kind of responsibility. Please make sure you pay attention at the activities you were doing on your holidays, as it could give more of the clue about your dream.
Read more about dreaming of Holidays in other dream meanings interpretations.