How to customize the leading and trailing days visibility in WinUI Scheduler (Calendar)
Customize the leading and the trailing days visibility of the scheduler month view by using the LeadingDaysVisibility and the TrailingDaysVisibility property of MonthViewSettings in WinUI Scheduler.
XAML
To customize the leading and the trailing days visibility of the scheduler month view by setting the LeadingDaysVisibility and the TrailingDaysVisibility property to Collapsed.
<Grid> <scheduler:SfScheduler x:Name="scheduler" ViewType="Month"> <scheduler:SfScheduler.MonthViewSettings> <scheduler:MonthViewSettings LeadingDaysVisibility="Collapsed" TrailingDaysVisibility="Collapsed"/> </scheduler:SfScheduler.MonthViewSettings> </scheduler:SfScheduler> </Grid>

Take a moment to pursue the documentation. You can also find the options like customizing the leading and trailing days visibility.