WinUI Calendar - Simple, Customizable Calendar Component

<Page
    x:Class="GettingStarted.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:GettingStarted"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:calendar="using:Syncfusion.UI.Xaml.Calendar"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <Grid Name="grid">
        <!--Adding Calendar control -->
        <calendar:SfCalendar Name="sfCalendar"/>
    </Grid>
</Page>

using Syncfusion.UI.Xaml.Calendar;

namespace GettingStarted
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            // Creating an instance of the Calendar control
            SfCalendar sfCalendar = new SfCalendar();

            grid.Children.Add(sfCalendar);
        }
    }
}