Why It's Already 2020

This time of year, we become a bit obsessed with daylight, days, and calendars. The new year is just a man-made concept, an arbitrary place to start a new calendar, while the revolution of the earth around the sun is a concrete amount of time we can measure. However, when the days, weeks, months, and years don't line up with each other for a variety of reasons, people tend to "fix" the calendar to be more useful for the moment. That leads us to the different calendars used for different purposes. On elf them is based on weeks for financial uses, and its also been appropriated for computer coding, which leads to some weird anomalies. Tom Scott explains.