Definitely the lunar effect, but that is still under study. There's a documentary called "The Shark Side of the Moon" which follows a scientist trying to prove a lunar effect on sharks. There's also some inconclusive evidence of a lunar effect on people with bipolar disorder; the full moon might trigger mania, probably due to excess light during nighttime. Context: >!People with bipolar disorder (known as 'manic depression' years ago) are very sensitive to light, substances, and many other things that can trigger manic or depressive episodes for them. The possible mania under the full moon may be a reason behind myths like werewolves and terms like 'lunatic'.!<

I'll edit if I find more.

Edit: I found another one which I would easily try or suggest to others if evidence-based therapies have failed.

Eye movement desensitization and reprocessing (EMDR) is a form of psychotherapy in which the person being treated is asked to recall distressing images; the therapist then directs the person in one type of bilateral sensory input, such as side-to-side eye movements or hand tapping. It is included in several guidelines for the treatment of post-traumatic stress disorder (PTSD). Some clinical psychologists have argued that the eye movements do not add anything above imagery exposure and characterize its promotion and use as pseudoscience.