thank you very much

/* In your css/custom.css */
.CX3 .cell {
  background-image: url("https://forum.magicmirror.builders/assets/uploads/files/1708912838487-calendar-background.001.png");
  background-position: top left;
  background-size: cover;
  background-repeat: no-repeat;
}

.CX3 .cell.today {
  background-image: url("https://picsum.photos/200?1");
  background-position: center center;
}

.CX3 .cell.month_2.date_28 {
  background-image: url("https://picsum.photos/200?2");
  background-position: center center;
}

.CX3 .cell.month_3 {
  background-image: url("https://picsum.photos/200?3");
  background-position: center center;
}

You can also use other prepred selectors like thisWeek, thisMonth, thisYear, year_2025, weekday_3, and its combination.
And this method was by the static date.
If you want to change the background of the specific cell dynamically by the event, See the cell manipulation parts in README.

1

.CX3 .month_6.date_16 {
  background-image: url("https://img.freepik.com/free-vector/flat-corpus-christi-illustration_23-2148934727.jpg?w=400");
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
}

Can I use this to add a background image to every date/square with “background-repeat” as a default and override it for specific dates?

works! my syntax was correct. i think having the folder of .jpgs outside the MMM-CalendarExt3 folder was why it wasn’t working.

How would I target cells for holidays that don’t fall on the same day every year? Is there a way to target the 328th day of the year?

again thank you very much.

I’ll assume your target local file would locate in

~/MagicMirror/modules/MMM-CalendarExt3/resources/target.png

AND you might run your MM on localhost like this;

http://localhost:8080

Then, you can access like below;

background-image: url("/modules/MMM-CalendarExt3/resources/target.png");

OR

background-image: url("http://localhost:8080/modules/MMM-CalendarExt3/resources/target.png");

your example works as you posted it. but if i want to target a local file as a background image for a specfic day. i cant get it to work. any HTTPS: i use works fine. i feel ive tried every variation i could find online. What’s the proper way to do that in calext3? thank you.

1. Thanks! I was so close. I thought I had to specify .cell. Also, I had completely forgotten to make an images folder, but that only took me 10 minutes to remember. :beaming_face_with_smiling_eyes:

2. Thanks. I’ll look at MMM-Touch.

3. Here’s my code. Yes, default works fine. It only messes up when I try to specify an icon.

Default Calendar

{
                        module: "calendar",
                        //position: "bottom_center",
                        config: {
                                colored: true,
                                broadcastPastEvents: true,
                                calendars: [
                                        {
                                        url: ...
                                        name: "CJ",
                                        color: "#3061E3",
                                        auth: {
                                              user: ...,
                                              pass: ...
                                        }
                                        },
                                        {
                                        url: ...
                                        name: "Family",
                                        color: "#DA2528",
                                        auth: {
                                              user: ...,
                                              pass:  ...
                                        }
                                        },
                                        {
                                        url: ...
                                        name: "Fiji",
                                        color: "#d2cf2a",
                                        auth: {
                                              user: ...,
                                              pass: ...
                                        }
                                        },
                                        {
                                        url:  
                                        name: "Clararee",
                                        color: "#a716b8",
                                        auth: {
                                              user: ...,
                                              pass: ...
                                        }
                                        },
                                        url: ...
                                        name: "Birthdays",
                                        symbol: "fa-solid fa-cake-candles",
                                        auth: {
                                              user: ...,,
                                              pass: ...
                                        }
                                        },
                                        {
                                        url: ...
                                        name: "Music",
                                        symbol: "fa-solid fa-music",
                                        auth: {
                                              user: ...,
                                              pass: ...
                                        }
                                        },
                                ],
                        }
                },

CalExt3

        {
            module: "MMM-CalendarExt3",
            position: "middle_center",
            config: {
                    mode: "month",
                    instanceID: "currentMonth",
                    firstDayOfWeek: 0,
                    useSymbol: true,
                    calendarSet: [],
            }
        },

.CX3 .month_6.date_16 {
  background-image: url("https://img.freepik.com/free-vector/flat-corpus-christi-illustration_23-2148934727.jpg?w=400");
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
}

2. You need any “Commandable” module like MMM-Touch for touchscreen or MMM-GroveGestures for gesture sensor or MMM-RemoteControl or MMM-GoogleAssistant or any module which can emit custom notifications by your intentional condition.

3. Show me your config. which symbol were you trying? With default symbol everything was ok?