Is the time of day always rounded down?
In other words, when a clock (or field) that shows just hh:mm, the minute portion changes when the true seconds go from 59 → 00, and not when the seconds go from 29 → 30.
What about when the time has precision greater than 1 second? Does the seconds displayed change when the tenths go from 0.9999 (or whatever the largest value less than 1 second is) → 0?
(As opposed to going from .4999 → .5000)