Calendar
The Calendar control is a standard Calendar control for users to select date(s) or date ranges.
Common Properties
| Property | Description | 
|---|---|
SelectionMode | Gets or sets a value that indicates what kind of selections are allowed. | 
DisplayMode | Gets or sets a value indicating whether the calendar is displayed in months, years, or decades. | 
SelectedDate | Gets or sets the currently selected date. | 
SelectedDates | Gets a collection of selected dates. | 
DisplayDate | Gets or sets the date to display. | 
DisplayDateStart | Gets or sets the first date to be displayed. | 
DisplayDateEnd | Gets or sets the last date to be displayed. | 
BlackoutDates | Gets a collection of dates that are marked as not selectable. | 
Reference
Source code
Examples
Basic Calendar
<Window 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="800" d:DesignHeight="450"
        x:Class="AvaloniaAppTemplate.MainWindow"
        Title="AvaloniaAppTemplate">
	<StackPanel>
		<Calendar SelectionMode="SingleDate" />
	</StackPanel>
</Window>
Range selection Calendar
<Window 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="800" d:DesignHeight="450"
        x:Class="AvaloniaAppTemplate.MainWindow"
        Title="AvaloniaAppTemplate">
	<StackPanel>
		<Calendar SelectionMode="SingleRange" />
	</StackPanel>
</Window>
After selecting the start date, a single range can be selected by holding the shift key and clicking on the end date.
Calendar with custom start and end dates
<Window 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="800" d:DesignHeight="450"
        x:Class="AvaloniaAppTemplate.MainWindow"
        Title="AvaloniaAppTemplate">
	<StackPanel>
		<Calendar Name="DisplayDatesCalendar" SelectionMode="SingleDate"/>
	</StackPanel>
</Window>
With this code to set the start and end dates:
var today = DateTime.Today; 
var cal1 = this.FindControl<Calendar>("DisplayDatesCalendar");
cal1.DisplayDateStart = today.AddDays(-25);
cal1.DisplayDateEnd = today.AddDays(25);