RadGrid Header Events

Thanks Ivan.

However, this doesn't prompt the next visible range dates. 

Such as; my current visible scheduler is weekly and i have got "Monday, 8 February - Sunday, February 14".  
When I click on the arrow of back which takes me last week than the startDate is Monday,8 February, the endDate is Sunday, February 14. Because these date are visible. It doesn't inform me the next targetted week's start-end date information.
Does it make sense?