The only built-in solution that I can offer in this case, is the IntervalSpans property
. In case this approach does not fit your requirements, there is no simple way to create custom intervals for the time being. We have the following two items regarding this functionality logged in our PITS - you can vote for them and give your ideas in the comments section:
Currently, the only way to create a custom interval, is to download the source code and implement it yourself.
All the best,
the Telerik team
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