Selecting Minimum and Maximum Calendar Dates

You can change the dates that calendar spans by setting the MinimumDate and MaximumDate properties in XAML or from the Properites window.

In XAML

Add MaxDate="12/22/9999" and MinDate="1/15/0001" to the <c1:C1DateTimePicker> tag so that the markup resembles the following:

<c1:C1DateTimePicker MaxDate="12/22/9999" MinDate="01/25/0001">

From the Properties window

Locate the MaxDate and MinDate properties in your application's Properties window. Either enter a date in the property settings field, or use the drop-down calendar to select a new minimum and maximum date.