DatePicker.DayFormat Property


Gets or sets the display format for the day value.

 property Platform::String ^ DayFormat { Platform::String ^ get(); void set(Platform::String ^ value); };
winrt::hstring DayFormat();

void DayFormat(winrt::hstring value);
public string DayFormat { get; set; }
var string = datePicker.dayFormat;
datePicker.dayFormat = string;
Public Property DayFormat As String
<DatePicker DayFormat="formatString"/>

Property Value




The display format for the day value.


Here's a DatePicker formatted using format templates, and a DatePicker formatted using format strings. Both DatePicker controls look the same when the app is run because the formatting is equivalent.

<!-- DatePicker formatted using format templates. -->
<DatePicker DayFormat="day" MonthFormat="month.numeric" YearFormat="year.abbreviated"/>

<!-- DatePicker formatted using format patterns. -->
<DatePicker DayFormat="{}{day.integer}" MonthFormat="{}{month.integer}" YearFormat="{}{year.abbreviated}"/>

A date picker with its fields formatted.

Here's a DatePicker that combines 2 format patterns to display both the numeric date and the day of the week in the day picker. There is no equivalent format template for this format.

<DatePicker DayFormat="{}{day.integer} {dayofweek.abbreviated}"/>

A date picker with the day field formatted to show an integer and abbreviation.


Change the format of the day picker by setting the DayFormat property.

The string content of each ComboBox in the DatePicker is created by a DateTimeFormatter. You inform the DateTimeFormatter how to format the day value by providing a string that is either a format template or a format pattern. Common templates and patterns for day values are listed in the following table.

format patternformat template
`{day.integer} | {day.integer(n)}``day`
`{dayofweek.full} | {dayofweek.abbreviated} | {dayofweek.abbreviated(n)}``dayofweek | dayofweek.full | dayofweek.abbreviated`

In some cases, using a format pattern gives you more precise control over the formatting. For example, you can use a format pattern to specify that the day picker always shows 2 digits, including a leading 0 when needed. You can also combine multiple format patterns. For example, you can combine the {day} and {dayofweek.abbreviated} formats to make the day picker show both the numeric date and the day of the week, like this: 14 Thu. See the Examples section for more info.

For the complete list of format templates and format patterns, see the Remarks section of the DateTimeFormatter class documentation.


Some date formats should be avoided if the date picker might be displayed in a small area, such as adding the full string value of the day of week. These strings can be long and might be clipped if the DatePicker's width is forced to be small.

Applies to

See also