What if time were circular?

What if time were circular?
We usually think about time as linear, from past to present to future....
But is this assumption really correct?
What if time were not linear? What if time were circular?
If time were circular then by travelling to the distant future, you actually would go all the way to the distant past and then finally return to the point of origin.
It would be like circumnavigating the Earth. Since Earth is not flat, travelling in a straight line actually makes you return to the point of origin.
If time were circular it would be exactly like travelling round the Earth.
We know how to travel to the future. That is exactly what we are doing right now, travelling to the future, one day per day.
But we don't know how to travel to the past. How can you go back in time?
If time were circular it would give us a way to travel to the past by going forward in time, instead of backwards.
The distant past and the distant future would be exactly the same place.
By going to the distant future, you would actually achieve the distant past, and then eventually the near past.
A time traveller would be someone who accelerates time.
A time traveller would always be someone from the past, never from the future.
Time paradoxes would not exist, since time travellers would never be from the future.