Calendar allows you to customize its appearance in different ways based on your requirements. You can choose to change the first day of the week displayed in the calendar, show a limited set of days in the displayed calendar month, hide the calendar header, display a single and multiple selected date(s), disable adjacent dates, and change the calendar type. Let us dive into the details of how to implement all these features in the following sections.

Set First Day of Week

By default, Calendar displays "Sunday" as the first day of the week. However, you can change it to display the first day of the week depending on your local culture using FirstDayOfWeek property of the C1Calendar class.

The following code uses the FirstDayOfWeek property to display "Saturday" as the first week in the Calendar:

<calendar:C1Calendar x:Name="calendar" FirstDayOfWeek="Saturday" HorizontalAlignment="Center" VerticalAlignment="Top"></calendar:C1Calendar>

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Set Minimum and Maximum Dates

Calendar allows you to display a date range and disable the rest of the dates from the calendar which implies that you can restrict the selection to the specified range of dates from the calendar. This can be done using the MinDate and MaxDate properties of the C1Calendar class which allow you to set the earliest date that can be selected by the user and latest date available for selection by the user at runtime, respectively.

The following code uses the MinDate and MaxDate properties to restrict the selection of dates in the calendar:

//Set minimum and maximum date for selection
calendar3.MinDate = new DateTime(2021, 8, 15);
calendar3.MaxDate = new DateTime(2021, 8, 25);

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Hide Calendar Header

In the Calendar control, the Header region has a huge significance. This is because, the Header when clicked expands the views, namely month, year and decade view. To elaborate, when you click the header in the 'month' (default) view, it expands to show the current year in the year view mode. Likewise, when the header of the 'year' mode is clicked, it expands to show the current 'decade' in the decade view mode. Also, when the header of the decade view is clicked, it expands back to the month view as demonstrated in the following GIF.

By default, the header is visible in the Calendar control. However, Calendar allows you to control the visibility of the header based on your requirements. It lets you choose whether to show or hide the header at runtime by setting the ShowHeader property to False.

The following image displays calendar with the hidden header.

The following code demonstrates how you can hide the calendar header.

<calendar:C1Calendar x:Name="calendar" ShowHeader="False" HorizontalAlignment="Center" VerticalAlignment="Top"></calendar:C1Calendar>

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Display a Selected Date

By default, the Calendar control allows you to select one date at a time. It also allows you to display a selected date in the Calendar when it loads by setting the SelectedDate property programmatically.

The following code shows how to set the SelectedDate property:

//Select specific date
calendar1.SelectedDate = new DateTime(2021, 8, 21);

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Display Multiple Selected Dates

Calendar also allows you to display more than one selected dates by setting the SelectedDates property as shown in the following image and code:

 //Select multiple dates
 // Set array of dates which need to be selected
 DateTime[] dateTimes = new DateTime[]
{
    new DateTime(2021, 08, 03),
    new DateTime(2021, 08, 05),
    new DateTime(2021, 08, 10),
    new DateTime(2021, 08, 15),
    new DateTime(2021, 08, 16),
    new DateTime(2021, 08, 17)              
};
 // Set the list of selected dates
 calendar2.SelectedDates = dateTimes;

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Disable Adjacent Dates

The adjacent days can be selected in the Calendar control, by default. However, Calendar allows you to control the selection of the adjacent days by enabling or disabling them based on your requirements. It lets you choose whether to disable the adjacent days at runtime for selection by setting the ShowAdjacentDay property to False.

The following code demonstrates how you can disable the adjacent days.

<calendar:C1Calendar x:Name="calendar" ShowAdjacentDay="False" HorizontalAlignment="Center" VerticalAlignment="Top"></calendar:C1Calendar>

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Set Calendar Type

The Calendar control lets you display different types of calendar using the CalendarType property. The CalendarType property specifies the type of calendar to be displayed using the CalendarType enumeration which allows you to set one of the following calendar types:

The type of calendar can be set using the CalendarType property as shown in the following code:

<calendar:C1Calendar x:Name="calendar" CalendarType="Japanese" HorizontalAlignment="Center" VerticalAlignment="Top"></calendar:C1Calendar>

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