Many people say that time seems to speed up as they get older.
There are a few theories for this, but a new paper suggests it could be down to a psychological habit called "chunking."
By bundling together similar experiences we could be perceiving our lives as moving by quicker.
The researchers suggest we try and look for the unique moments in life to try and stop us lumping things together this way.
Another new year, another opportunity to say: "Where did the last 12 months go?"
It's very common to hear people say that it feels like time is slipping away faster and faster as they get older. Many of us will be guilty of making the remarks, because sometimes it does feel like a year can be gone in a flash.
As for why it happens, there have been a few theories over the years. One is that it's because when we are younger, a year makes up a larger percentage of our lives. For example, at four years old, one year will be 25% of your entire life, so it might feel like longer. As you get older, this percentage gets smaller and smaller.
Another possibility is that our biological clocks slow down as we age. Or it could simply be because we pay less attention to time slipping away when we are children.