well - 3:2 -

That is 1.5 planet rotations to 1 solar orbit.

if in the same direction, the planet rotates 1.5 times as it circles the sun, so as the sun also appears to rotate the planet once as well with respect to the surface, during the year, that makes 1.5 turns MINUS 1 apparent turn, which is 0.5 turns. As a daylight period is half a rotation, ie half is in darkness and half is light, then 0.5 turns is 1 period of daylight per year.

If it rotates the other way (unlikely I think), it is 1.5 PLUS 1 = 2.5, so that's 5 periods of day and night each year, so each daylight period is 1/5th of a year, = 0.2 years...

Dave L

The Journal of Ancient Egyptian Architecture JAEA:
[egyptian-architecture.com]
[glasgow.academia.edu]
[egyptology-scotland.squarespace.com]
Dave's Archaeology Homepage:
[arkysite.wordpress.com]