Every day is longer than the previous day

Did you know that every day is longer than the previous day?
Today is about 2 milliseconds longer than yesterday. This is caused by the slowing Earth rotation. Earths rotation slows down by 2 milliseconds every day. The slowing rotation is not noticeable, because it’s only a very small difference. Only after 500 years Earths rotation slowed down by a second.

The compensate the difference in time and calendar, once in a while a leap second is added to the time system. This always takes place during new year.