that time of the month?

Since working in the hospital for a few years, I have heard on multiple occasions that such and such a problem is going on again because it is a full moon. BMC Nursing puts this notion to rest in a recent research article:

The inpatient fall rates in this hospital were neither associated with days of the week, months, or seasons nor with lunar cycles such as full moon or new moon. Preventive strategies should be focused on patients' modifiable fall risk factors and the provision of organizational conditions which support a safe hospital environment.