Post an image of the code you currently have in the 'userChrome.css' file.

I'm using the following which works ok for week, multi-week and month even when I expand window to maximise. It will be similar to what you see on a 'day' setting, but that depends upon the width of window. For the window size I use, it never appears even in day setting. It depends upon the min-width - I've got 1000px.

/* CALENDAR  - set event colour instead of calendar colour */

.calendar-category-box{     margin:0 0 0 -200px !important;     min-width: 1000px !important;     }    
.alarm-icons-box,.reminder-icon{     margin:0 0 0 0!important;     }    
.event-name-label,.item-time-label,.alarm-icons-box,.reminder-icon{     z-index:100000!important;     }     
.calendar-item-flex{     padding:0!important;     }     
.calendar-month-day-box-list-item{     margin:0!important;     }     
.calendar-color-box{     border:none!important;     }      
.event-name-label{     white-space:break-spaces !important;     }    

Many thanks for getting back to me. I really appreciate it. Please see below what was in my .css file in Chrome. I note that the only difference is the min-width: 200px (yours 1000px)

/* Calendar - set event category colour instead of calendar colour */

.calendar-category-box{ margin:0 0 0 -200px !important; min-width: 200px !important; } .alarm-icons-box,.reminder-icon{ margin:0 0 0 0!important; } .event-name-label,.item-time-label,.alarm-icons-box,.reminder-icon{ z-index:100000!important; } .calendar-item-flex{ padding:0!important; } .calendar-month-day-box-list-item{ margin:0!important; } .calendar-color-box{ border:none!important; } .event-name-label{ white-space:break-spaces !important; }

So I have copied and pasted yours, and all works how I was wanting.

Many thanks for your help, it is very much appreciated.

Good to hear all is ok. Would you be so kind to select my initial comment as the Chosen Solution as it helps the database to improve search for anyone needing a similar solution. I think it also helps when using google. Many thanks.