I don't think that this will be possible. The thing is that even that you have hidden the year, in the background the entry is parsed to a DateTime. When you write 02-29 this is parsed as 02-29-2013 and as this year there is no 29 th of February the parsing fails.So the SelectedValue
is of type DateTIme, so there is always an year part and if you don't specify the year it automatically takes the current year.
The only thing that you can do is to use custom parsing as shown in this help article
, but you will still have to specify an year, but you can specify one that have 02-29.
Hope this helps.
All the best,
the Telerik team