[Zope] Searching date ranges on catalogs.

I just wondering if you can do it with ZCatalogs. I have a product wich I called reserve and it has two fields: startDate and endDate (both field Indexes). The entry of my python script is a date (let's say currentDate). I just need to do search the objects wich satisfy the following condition: startDate<=currentDate<=endDate. Thanks in advanced, Josef.