I saw there is another error on Tcalex
As you can see here I have a small calendar at left and tcalex at right

Mounth view
Run ok .
If I show the mount view December and press the black arrow then it change also the small calendar I have at left
Week view
Run ok .
if I show the week view and press the black arrow then it change also the small calendar I have at left
Day View
Problem.
If I show the day view and press the black arrow then it not change also the small calendar I have at left
I doubt there is an bug on tdayweek class
as you can see here

As you can see here I have a small calendar at left and tcalex at right

Mounth view
Run ok .
If I show the mount view December and press the black arrow then it change also the small calendar I have at left
Week view
Run ok .
if I show the week view and press the black arrow then it change also the small calendar I have at left
Day View
Problem.
If I show the day view and press the black arrow then it not change also the small calendar I have at left
I doubt there is an bug on tdayweek class
as you can see here

Since from 1991/1992 ( fw for clipper Rel. 14.4 - Momos)
I use : FiveWin for Harbour March-April 2024 - Harbour 3.2.0dev (harbour_bcc770_32_20240309) - Bcc7.70 - xMate ver. 1.15.3 - PellesC - mail: silvio[dot]falconi[at]gmail[dot]com
I use : FiveWin for Harbour March-April 2024 - Harbour 3.2.0dev (harbour_bcc770_32_20240309) - Bcc7.70 - xMate ver. 1.15.3 - PellesC - mail: silvio[dot]falconi[at]gmail[dot]com