I don't think anyone actually knows what Time is.

It can be imagined as continuous, as in Zeno's Paradoxes, but it is actually measured discretely. So to answer the OP, there isn't any point in time that is simultaneously in two years.

Time is continuous in Relativity, but it isn't absolute - every observer has their own personal time that appears to progress at a different rate to that of other observers with different acceleration.

Thanks to Quantum Theory, Time might actually be discrete. There is the concept of the Planck Time, the smallest possible interval.

Oddly enough it can actually be the beginning of 2009 in London when it is still 2008 in Hawaii thanks to the magic of timezones!