When transiting Uranus is conjunct your natal Saturn: Structures of your life are under attack by sudden and unpredictable events. If you have been unhappy with some aspect of your life it is likely to become intolerable now. It may just snap suddenly. Then you realize that you cannot go on like this anymore.
diurnal (comparative more diurnal, superlative most diurnal) 1  Happening or occurring during daylight, or primarily active during that time. ( 2 botany) Said of a flower open, or releasing its perfume during daylight hours, but not at night.
A circadian rhythm is a rhythm that repeats about every 24 hours. Plants and animals have these built-in cycles which allow them to flower at the right time, sleep at the right time etc. The word circadian comes from the Latin circa, around, and diem or dies, day, meaning about a day..