Hello! in config write ‘showEnd: false’. see this link: https://forum.magicmirror.builders/topic/8856/calendar-module-1-day-error. Hope it helps you. Nisse

Hello! It’s working for me. My config:

{
                        disabled: false,
                        module: "MMM-EARTH",
                        position: "middle_center",
                        config: {
                                mode: "Natural",
                                rotateInterval: 15000,
                                animationSpeed: 0,
                                MaxWidth: "45%",
                                MaxHeight: "45%",
                                }
},

Hi! Se this link https://forum.magicmirror.builders/topic/8856/calendar-module-1-day-error/10 how to fix it.
The calendar displays Today ends 13 oktober for a fullday event.

Glad to help. Have a nice weekend

Hello again!
I Think that you shouldn’t put quotes rond false
Here is my config:

module: ‘calendar’,
header: ‘Kalender, Helg-och födelsedagar’,
position: ‘top_left’,
config: {
colored: true,
timeFormat: ‘absolute’,
maximumEntries: 12,
urgency: 2,
dateFormat: ‘Do MMM’,
fullDayEventDateFormat:‘Do MMM’,
showEnd: false,
getRelative: 48,

Hi! If you put showEnd: false, in your config for calendar solves the problem.
Oct 9th is and nov 1st when it ends.

@tbbear If you put lang: and your languagecode from Wunderground in MMM-NOAA:s config in my case SW for Sweden
it works.

Re: Weatherunderground - currently - hourly - daily - configurable
Last update this morning of MMM-WunderGround.js. There is 2 places daily is spelled "dayly, so it,s not working OK.