Apple Watch tracks how much time you spend sitting versus standing. The current thought process is that sitting – especially for extended periods of time – is not good for your physical health. The watch tracks if you have stood up at least once in an hour and moved around. The goal it sets is 12 such hours. Every hour, if you have not stood up and moved, it beeps you with a stern message – a la my primary school teachers – “Stand up”.
That watch thinks that I have achieved 27 such hours yesterday. (Of course, it got fooled by the fact that I was traveling against the spin of the earth and therefore “gained” extra hours in a “day”)