不确切解决方案，但你可以知道如何解决你的问题。

如何限制Microsoft AJAX Calendar Extender上的日历日期 [ ^ ]



-KR

Hi,

I am working in asp.net web application. I am using ajax calendar extender on textbox in my web application. My requirement is that i want to disable 29, 30 and 31 day of every month in ajax calendar extender.

please give any idea or any link so that i can do this.

Not the exact solution, but you can get some idea how to workaround for your problem.
How to Restrict the Calendar Dates on Microsoft AJAX Calendar Extender[^]

-KR