The background color for any appointment needs an option to be transparent. At first, I liked all the color coding, then as my calendar filled up, it became over whelming, too busy on the eyes. Need to use color sparingly, so a transparent option is needed.

Can there be a way this calendar be limit-less instead of only a 3 years history?  Is there a way to back up? 

On Windows, it's hard to only allow this app goes through certain proxy like in browser it's very easy to configure a proxy. Hope this could be added.

I scheduled an event and saved it just now.    Subsequently, I realized that the event is recurring.  I don't see any way to add recurrence to the event.  Please make it possible to add recurrence to an event. 

By importing data from different locations, dobble birthdays could be imported

Most apps I use have a setting to automatically start them when logging into Windows. Since I use One Calendar constantly, it would be nice if I had such a setting for it too.

Sometimes I may want to have a link to a website in the description or even an application link that pulls up something in another app, usually formatted like app_name://x-callback-url/action_name?id=87170e427bfe4a94b21160ec35c86cd3

It would be cool if I could do a faster change of an event's color, like by right-clicking on the event and seeing the color palette right there from which I can choose the new color.

When a new appointment is created for the first time, proposal from existing appointments with transfer of times. Focus on empty date field.

Selection from dropdown list with mouse click and transfer of data into the appointment form. I have not found this useful feature in any calendar for Windows.

Since I have the same app on two different platforms, is there a way the settings can be synced between the 2 platforms? Such as adding additional accounts, or changing calendar colors on the 2 devices at the same time.

When I close Windows One Calendar, and then re-open, it remembers the last view that was used, i.e. Day, Week, List, etc. Is there a way to have a default view that comes up every time the app is started, like the Month view?

Hi, How about a crossplatform 1 QR Code setup function to speed up the reinstall of all calendars?

I still use the Outlook contact list for email. I'd like to use the contacts for sending invitations. Alternatively my Google contact list would also work.

Please can you implement a feature where if the mouse pointer hovers over a day in the Year View the items on that day are displayed.

This is helpful for those of us who plan a year in advance.

Alternatively if the back button could be defined to go back to the year view after clicking into a month that would be great.

I can no longer use my companies calendar because they blocked all authorizations, is there a web portal where I can access it through internet

I was thinking that it would be great to share the onecalander to others. I have multiple inputs(calendars) added to my onecalander to have them in one place. However, i would like the possibility to share the onecalander view to others (ex: family, job, etc) with posts just listed as "busy" or similar.  I know it can be printed, but getting a link to it or such for sharing would be great. And if possible, in that option being able to set if its just supposed to say busy or show appointments.  That would be great!

I was trying to sync my calendar from my email service provider Posteo.de with OneCalendar. However, I get the following error message below. I get the same error when I am trying to sync my calendar on my iPhone. (I changed a few details in the error message where my user ID was shown.)

Could the reason be that there is something wrong with events that I imported from my old Google Calendar into my current Posteo Calendar?

Thank you in advance!