We noticed that if closed days are configured, and a closed day is between the due date of a loan and the planned day on which the first reminder should be sent, the job does not generate a notification on that day but waits until the next one.
This leads to misunderstanding on the patrons side, because the grace period is not always identical and can vary depending on possible closed days.
We described the issue in case nr. 05301818 (old SF nr.: 00953477) and were told that this is the expected behaviour. The Product manager decided that when there's a closed day between the job run and the due date, due to the request for not sending emails on closed days, it will check another extra day.
We would like IZs to be allowed to choose whether they want this extra day or not, by adding e.g. some parameter in the overdues configuration.