I am using the latest version of ACT 4.5.7.123 & found a particular bug when changing years. Its really hard to repro the issue so ill be as thorough as possible. The bug can be reproduced in the "Default Calendar"(first one) & the "Calendar with an associated button"(Third one) available as demo here: [ACT Samples](http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/Calendar/Calendar.aspx)
Or you can also, create a new project, add a textbox & a CalendarExtender.
```
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<ajaxToolkit:CalendarExtender ID="TextBox1_CalendarExtender" runat="server"
Enabled="True" TargetControlID="TextBox1">
</ajaxToolkit:CalendarExtender>
```
1.- Using your mouse only click on the "Month, year", to get to the month selection,
2.- Then click on the year to get to the year selection.
3.- Click on "2012", click on April, then click on day 4
the current value should be "04/04/2012"
During this whole process you should only use your mouse, do __not__ type the date.
4.- remove your focus from the calendar and then click again on the "Month, year" at the top.
5.- Click on the year, then on "2013"
__Result:__
The year selected is not "2013" it stays at "2012".
The issue seems to only happen when dealing with the current year and the previous one, changing to any other year makes the control behave normally again.
Comments: I'm having same issue. I'd like to show any future date within 1 year of current date. I was used startdate and end date for getting these dates. The dates was displaying ok, everything looks good except the problem is I cann't select the future year eventhough it's in the range. for example I was used start date today(03/21/2013) and end date is 03/20/2014. When I'm trying to select the date from calender extender it's always going to 2013 eventhough I clicked 2014. This issue happend only until I select the current year. Once I select the current year I'm able to select future year. I agree with above comments and I tried different versions like 3.5 and 4.1 for using Start date and end date also tried without using the dates same thing happened. Its not the problem with all the years selection only happen 2014. I'm able to click 2015 and 2016 etc., but not 2014 its just jumped to 2013. I really appreciate if have any solution because my project implementation date is coming soon.
Or you can also, create a new project, add a textbox & a CalendarExtender.
```
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<ajaxToolkit:CalendarExtender ID="TextBox1_CalendarExtender" runat="server"
Enabled="True" TargetControlID="TextBox1">
</ajaxToolkit:CalendarExtender>
```
1.- Using your mouse only click on the "Month, year", to get to the month selection,
2.- Then click on the year to get to the year selection.
3.- Click on "2012", click on April, then click on day 4
the current value should be "04/04/2012"
During this whole process you should only use your mouse, do __not__ type the date.
4.- remove your focus from the calendar and then click again on the "Month, year" at the top.
5.- Click on the year, then on "2013"
__Result:__
The year selected is not "2013" it stays at "2012".
The issue seems to only happen when dealing with the current year and the previous one, changing to any other year makes the control behave normally again.
Comments: I'm having same issue. I'd like to show any future date within 1 year of current date. I was used startdate and end date for getting these dates. The dates was displaying ok, everything looks good except the problem is I cann't select the future year eventhough it's in the range. for example I was used start date today(03/21/2013) and end date is 03/20/2014. When I'm trying to select the date from calender extender it's always going to 2013 eventhough I clicked 2014. This issue happend only until I select the current year. Once I select the current year I'm able to select future year. I agree with above comments and I tried different versions like 3.5 and 4.1 for using Start date and end date also tried without using the dates same thing happened. Its not the problem with all the years selection only happen 2014. I'm able to click 2015 and 2016 etc., but not 2014 its just jumped to 2013. I really appreciate if have any solution because my project implementation date is coming soon.