Thank you for your response, however if I schedule like you recommend, the calendar offers me incorrect time slots, for example: 11:15 a.m.-12:15 p.m. or 11:30 a.m.-12:30 p.m. or 11:45 a.m.-12:45 p.m. Is it a bug ? I found a workaround by adjusting the working hours like this: instead of 9:00 a.m. to 12:00, I indicate 9:00 a.m. to 11:05 a.m. so the last appointment is 11:00 a.m. to 12:00