order by ..PIVOT SQL Server

Hi

I have a pivot like this

PIVOT

(

SUM(NumberOfOrders)FORCalendarMonthIN([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])

)ASpv1

I wish to order by the CalendarYear, CalendarMonth, but cannot do this because I cannot place an order by before the pivot. How can I do this please

please help