>The point in time is a data point (on the time axis, if you will) You need some way to place in on that axis, though. Commonly we use Day, Month, and Year to

>The point in time is a data point (on the time axis, if you will) You need some way to place in on that axis, though. Commonly we use Day, Month, and Year to do so. But we could also define a date as the seventh Wednesday in 2019. Or as an integer relative to Jan 1 1970.