Trying the following formula unsuccesfully:
=COUNTIFS([Final Deliverable Due Date]135:[Final Deliverable Due Date]146, @cell = DATE(23, 3, 31))
it shows at least 3 times in the cell range, but my result is always zero.
@Jmac First of all, good job overall with your formula. I see 1 issue that is easy to solve. In the Date() funciton, you need to enter the year as 4 digits, so 2023 instead of just "23".
Date(2023, 3, 31)
ref must be one of: categoryID, siteSectionID, category, category/categoryID, category/name, category/description, category/url, category/allowedDiscussionTypes, locale, siteSection, siteSection/basePath, siteSection/contentLocale, siteSection/sectionGroup, siteSection/sectionID, siteSection/name, siteSection/description, siteSection/apps, siteSection/attributes, layoutViewType, discussionID, commentID, page, latest, sort, sortType, lookupSort, discussion, discussion/name, tags, breadcrumbs, discussionApiParams, serverDraftID, serverDraft.