It’s Tuesday at 9pm and I have a race set up for Friday at 8:30pm. So the race starts in 2d23h30m, which most of us would say is about 3 days.
However, Companion app says my race is already in two days:
That is some serious rounding down (/flooring) 
I suggest using a more typical rounding, if you really want to round it to number of days…