Thanks @Ermos but I hope that people read the entire links kindly given by you and not just the quotations selected.
The full link indicates why I switch off for much time :
When I was working my main listening was restricted to weekends except, as now, during the Proms season. Even now although I am perforce at home most of the time I reserve music listening to dedicated periods. Further the cost of electricity in the UK has recently increased significantly :
In regard to the clock itself:
I do not know exactly where Ludovic lives but France experienced exceptionally high ambient temperatures this summer ( equal to or exceeding the normal operating temperatures of the clock) especially in the South East. So I wonder if this had any impact of the appearance on the warning CAL icon?