Even postponed it is an "important" feature. I and many players will wonder "Why
the clock is saying that is 00:00 and there is full light, with everyone awake,
even if no light source?".

A solution is dissolve a color with 20% of opacity, that is proportional to the
hour (from 00:00 to 12:00 it is increasing towards #FFFFFF and from 12:00-24:00
it is decreasing towards #000000).