There are several aspects to dreaming about the future. We may be aware within the dream itself that the events will take place in the future and are usually to do with actions we need to take in waking life. We also may have precognitive dreams, which is when we dream of events – sometimes symbolically – before they take place, and then recognize that we already have the information: we ‘knew’ about it.
The past, present and future coexist side by side, as it were, and it is possible to ‘read’ these records in the dream state. Our experience of them is subjective, although we are in the position of observers.