Implement Jquery Datepicker Using Jquery UI With Example
First of all, add Jquery min file and Jquery UI as reference to your Solution and page.
Refer Jquery Min File From Here,
Refer Jquery UI File From Here
And then add following style sheet from Jquery UI..
Refer Jquery Tab Style Sheet From Here

Second step is to add one Textbox on your page.
You can add one Asp Textbox or HTML Textbox.
Give ID for your Textbox as TextBoxID.
Third, inside document.ready, we make use of Jquery Datepicker.
You can place following code for Jquery Datepicker.
$(function() {
$( "#TextBoxID" ).datepicker();
});
That's all, if you click on the TextBox, you can see the Jquery Datepicker on the Browser.