LanMountainDesktop/LanMontainDesktop/Views/Components/MonthCalendarWidget.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d"
             d:DesignWidth="280"
             d:DesignHeight="280"
             x:Class="LanMontainDesktop.Views.Components.MonthCalendarWidget">

    <Border x:Name="RootBorder"
            Background="{DynamicResource AdaptiveSurfaceRaisedBrush}"
            BorderBrush="{DynamicResource AdaptiveButtonBorderBrush}"
            BorderThickness="1"
            CornerRadius="28"
            ClipToBounds="True"
            Padding="14">
        <Viewbox Stretch="Uniform">
            <Grid x:Name="LayoutRoot"
                  Width="280"
                  Height="280"
                  RowDefinitions="Auto,Auto,*"
                  RowSpacing="10">

                <TextBlock x:Name="HeaderTextBlock"
                           Grid.Row="0"
                           FontSize="42"
                           FontWeight="Bold"
                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />

                <UniformGrid Grid.Row="1"
                             Columns="7">
                    <TextBlock x:Name="WeekdayText0" Text="S" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                    <TextBlock x:Name="WeekdayText1" Text="M" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                    <TextBlock x:Name="WeekdayText2" Text="T" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                    <TextBlock x:Name="WeekdayText3" Text="W" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                    <TextBlock x:Name="WeekdayText4" Text="T" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                    <TextBlock x:Name="WeekdayText5" Text="F" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                    <TextBlock x:Name="WeekdayText6" Text="S" HorizontalAlignment="Center" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" FontSize="20" FontWeight="SemiBold" />
                </UniformGrid>

                <Grid x:Name="CalendarGrid"
                      Grid.Row="2"
                      RowDefinitions="*,*,*,*,*,*"
                      ColumnDefinitions="*,*,*,*,*,*,*" />
            </Grid>
        </Viewbox>
    </Border>
</UserControl>