Holidays in red in calendar navigator

[Janne74]

Is it possible to show holidays in red in Calendar navigator?
In top left of Outlook, here:

If not, are there any plans to add this feature?

[#2]

A related discussion exists in the below thread,

https://answers.microsoft.com/en-us/outlook_com/forum/all/when-i-import-holidays-into-calendar-how-c...