Time ? Does time as we know it really exist or do we walk through time ?

"Premonitions" are simply intelligent forecasts of the the probability of future events. While I know it is possible that I might be seriously ill in the night or that an accident might close the railway, I can predict that it is highly likely that (or, if you like the term 'have a premonition that') I will catch my usual train to work tomorrow. That is not evidence that "the future and the past are happening now", just that people are capable of making logical deductions from evidence.

not sure what weed you are smoking.
tomorrow is clearly tomorrow, and not now.