@bobbylx It could be because you aren’t settings the mode to week or month? It seems that the default is week but that would require that you omit the tag altogether rather than explicitly setting it to an empty string.

@MMRIZE This was super helpful, thank you! It resolved the issues I was having.

I ended up modifying MMM-CalendarExt3.js so that I could better control the time format. Since I’m using this in portrait mode, I don’t much space so for time values I wanted

4:00 PM -> 4
5:30 PM -> 5:30

{
   module: "MMM-CalendarExt3",
   position: "bottom_center",
   title: "",
   config: {
     mode: "month",
     instanceId: "basicCalendar",
     minimalDaysOfNewYear: 1,
     maxEventLines: 5,
     firstDayOfWeek: 0,
     eventFilter: (ev) => {
       if (ev.title.isFullday) return false
       return true
     },
     eventTransformer: (ev) => {
         if (ev.title.search('a') > -1)  ev.title = 'test'
         return event
     },
}

Great work @MMRIZE ! I like how this calendar looks much better.

I am having an issue with the eventTransformer though. I can’t seem to get it to update any of the event properties.

Is it possible to use the same symbols/icons as set in the calendar module?