Have icons or emoticons for Calendar.
I Use a calendar a lot to set up meeting, schedule time off, birthday reminders, vacations. it would be great to have icons or emoticons as an options for example on the birthday event maybe a birthday hat or balloon so that way of want to overview what's going on for the month you visually can see easily what's going on.
We recently added support for emojis in item titles, which are also visible on the calendar. We have no emoji picker in the editor, but you can copy them from a website like https://getemoji.com/ or use a browser extension like https://chrome.google.com/webstore/detail/emoji-keyboard-emojis-for/fbcgkphadgmbalmlklhbdagcicajenei