From Wikipedia

Psychologists, however, have found that there is no strong evidence for effects on human behavior around the time of a full moon.[12]

12. “Full Moon Effect On Behavior Minimal, Studies Say”. National Geographic News. 6 February 2004. Archived from the original on 24 July 2017. Retrieved 3 December 2005.

TL;DR: Overall, studies show different answers, which could be the cause of:

• Unrelated, manually picked data from some area
• Small sample size

en.wikipedia.org/wiki/Full_moon#cite_ref-12 en.wikipedia.org/wiki/Lunar_effect

Probably a case of: only people that experience out of the ordinary rates around those periods or days will speak up about it due to the phenomenon having some popularity, while others forget or don’t talk about it.