hey, i'm trying to search for documents that has date value.
my problem is that i'm trying to search for all the documents that "happen" this month but it return me nothing.

var eventCriteria = ExamineManager.Instance.SearchProviderCollection["MySearcher"].CreateSearchCriteria(UmbracoExamine.IndexTypes.Content);
            DateTime firstDayOfTheMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
            DateTime lastDayOfTheMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).AddMonths(1).AddDays(-1);
            var eventFilter = eventCriteria.Range("eventDate", firstDayOfTheMonth, lastDayOfTheMonth).Compile();
EventSearchResults = ExamineManager.Instance.SearchProviderCollection["MySearcher"].Search(eventFilter);