I need to verify if Christmas falls within a date range. My best guess is the following formula:

=OR(IF(DATE(YEAR(StartDate),12,25)>StartDate,1,0),IF(DATE(YEAR(EndDate),12,25)<EndDate,1,0))*1

The problem I have is when the date range falls between two years. How can I make it check the total number of christmas included within the date range.

Thanks.