Absolutely… Similar argument holds for the year btw. In that case it is better to treat a “day” or “year” as an artificial time constant and define them as 2π while skipping all the astronomical context. Otherwise you are free to write UT1D in a 2π notation also.
Actually a day is slightly longer than 2π since our orbit shifts the point of the circle that faces the sun each revolution.
Absolutely… Similar argument holds for the year btw. In that case it is better to treat a “day” or “year” as an artificial time constant and define them as 2π while skipping all the astronomical context. Otherwise you are free to write UT1D in a 2π notation also.