All reports in Mews can either be filtered by days or up to the minute.
All reports that can be filtered to the minute have to be set to 12:00 AM (00:00) on the start date, and 12:00 AM (00:00) on the next day to include the whole day.
Since Mews closes the day at midnight with the possibility to add items in the past, the posting date still remains before midnight.
For this reason, if you want to filter full days, your filters should look like this:
There, I am looking for the reservation report for the entire day of the AUG 18, 2020.
Since we set the report to end at 12 AM on AUG 19, 2020, only bookings created on AUG 18, 2020, until midnight are included in the search.