IMO the calendar needs some improvements in general. Some rants I have about it:
When creating a new appointment, I set the duration by hand. However there is no option to make it the default choice. So with every appointment I have to do more steps just to set the ending time right.
Next would be default reminder, which is set to 15 minutes and you can't change it. Usually I prefer 30 minutes, yet another additional step needed to create an appointment the way I want.
Last but not least I finally made the switch using an online cloud based calendar for the first time, which would be outlook.com - obviously! However I'd like to have events displayed much further in the past, yet the only available options seem to be,linked,from your outlook mail account: 2 days, 7 days, 2 weeks, 1 month or everything. Wondering why they don't create two or three month settings or, even better, make individual timeframes just for the calendar.