Calendar app for phone

It would be an amazing quality of life addition to have a calendar app for the phone where we could make reminders of something on a specific day and time and being able to add a title for the reminder. There are so many events going on that people would like to attend and its hard to keep track if you dont make a note in the notes app, but that looks like a jumbled mess if theres a lot of events (also considering that the notes app doesnt retain formatting). This would be super nice to have something similar to the iphone calendar app