Mass Assignment of Time Shift

Hi,

I have created Time based shift and want to allocate for different time period like for a month or 2 months for a group of employee.

One option I found in "Planned Scheduled" in "Time Management" but the limitation is it allows only day wise and there is no date range available. Where can I find an option where I can assig a shift for a whole month to an employee or group.

Regards

Majid