You could use the filterMenuInit
event to get reference to the DatePicker widgets of the filter menu and to set the desired min value:
Note that the DatePicker will set the value only if the entered date is valid and within the defined range.
Telerik by Progress
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items