I had the same problem . Solved it by adding
apiVersion: “2.5”,

Since the default changed from 2.5 to 3.0

@sdetweil just wanted to say that it worked for me to do that.

I am new with posting here.

@sdetweil

this was the solution i came up with.

eventTransformer: (event) => {
    const currentYear = new Date().getFullYear();
    const age = currentYear - event.firstYear;

    event.title = `${event.title} (${age} year)`;

    return event;
},

Chatgpt is my friend.

@sdetweil

this was the solution i came up with.

eventTransformer: (event) => {
    const currentYear = new Date().getFullYear();
    const age = currentYear - event.firstYear;

    event.title = `${event.title} (${age} year)`;

    return event;
},

Chatgpt is my friend.

@sdetweil thanks then i know.

well i dont know how to use the eventFilter for that, is there any example then i could try?
I am not the best at those kind of things. Mostly copy paste and trial and error.

Hello.

Have been using MMM-CalendarExt2 for some years now and changed to MMM-CalendarExt3 today.

The thing was that my birthday events that i have in my my calender, i would like to say a the age of the person. The Calendar module you can use displayRepeatingCountTitle and repeatingCountTitle to show the years from when you put the event in the calendar. For example i tried put my birthday on the year i was born and put repeat every year on same day and it did show number.

Was wondering if this funktion work in MMM-CalendarExt3?

@sdetweil just wanted to say that it worked for me to do that.

I am new with posting here.

I had the same problem . Solved it by adding
apiVersion: “2.5”,

Since the default changed from 2.5 to 3.0