I have a form of time–space synaesthesia, so the new year arrives for me in a very physical way. I feel myself move around the year, almost like I’m travelling along a structure. December sits low and to my left; January lifts and slides forward. The transition has a weight to it, as though the calendar itself shifts in space.

Synaesthesia is a perceptual condition where one sense triggers an experience in another sense. For some people, sounds trigger colours and shapes, or words might have tastes.

For others, like me, sequences such as months of the year or days of the week have precise places in space around our bodies. It is most commonly a developmental condition, which means that “synaesthetes” have experienced the world this way for as long as they remember. These synaesthetic experiences happen automatically, and are generally consistent over time for the person. Today is in front of me, tomorrow is to my left, and yesterday is to my right. If I ever woke up to find time had moved somewhere else, I would feel confused and lost.

For me, this makes the start of the new year feel like a physical transition, a time for new beginnings, as we move around the bend of time, leaving the old year behind me.

Like most people, between Christmas and new year, I completely lose track of what day it is — the whole week feels like a strange, timeless blur. Because of my time-space synaesthesia, this disorientation is amplified for me. The usual mental map I rely on to anchor dates and days seems scrambled, leaving me feeling unmoored.

As a cognitive psychologist, I have spent the last 20 years researching synaesthesia. I am fascinated by the way our minds help us experience the world around us, and particularly in the way we all experience........

© The Conversation