One idea I wrote up was to divide the year and the day in a consistent way, rather than having separate reform proposals for the clock and the calendar.
(It relies on the coincidence that the ratio of the length of the year to day, 365.2422, can be very, very closely approximated by the fraction 46,751 / 128.)
https://en.wikipedia.org/wiki/Tropical_year
* This is the ratio of the mean tropical year to the mean solar day; We use means because both the length of the day and the length of the year vary.
The period of rotation (day) of the planet varies due to tidal friction (the moon "drags" oceans against the earth's rotation) and other shifts in mass (e.g. earthquakes) that change the moment of inertia.
https://en.wikipedia.org/wiki/Leap_second#Slowing_rotation_o...
The period of revolution (year) varies mainly due to precession of the equinoxes.