diff --git a/Sources/Internal/VisibleItemsProvider.swift b/Sources/Internal/VisibleItemsProvider.swift
index 476dbd9..71dee75 100644
--- a/Sources/Internal/VisibleItemsProvider.swift
+++ b/Sources/Internal/VisibleItemsProvider.swift
@@ -950,13 +950,11 @@ final class VisibleItemsProvider {
       daysAndFrames: dayRangeLayoutContext.daysAndFrames,
       boundingUnionRectOfDayFrames: dayRangeLayoutContext.boundingUnionRectOfDayFrames)
 
-    if let dayRangeItemModel = dayRangeItemProvider(dayRangeLayoutContext) {
-      context.visibleItems.insert(
-        VisibleItem(
-          calendarItemModel: dayRangeItemModel,
-          itemType: .dayRange(dayRange),
-          frame: frame))
-    }
+    context.visibleItems.insert(
+      VisibleItem(
+        calendarItemModel: dayRangeItemProvider(dayRangeLayoutContext),
+        itemType: .dayRange(dayRange),
+        frame: frame))
   }
 
   private func handlePinnedDaysOfWeekIfNeeded(
@@ -1031,8 +1029,7 @@ final class VisibleItemsProvider {
         let layoutContext = overlayLayoutContext(
           for: overlaidItemLocation,
           inBounds: bounds,
-          context: &context),
-        let itemModel = itemModelProvider(layoutContext)
+          context: &context)
       else
       {
         continue
@@ -1040,7 +1037,7 @@ final class VisibleItemsProvider {
 
       context.visibleItems.insert(
         VisibleItem(
-          calendarItemModel: itemModel,
+          calendarItemModel: itemModelProvider(layoutContext),
           itemType: .overlayItem(overlaidItemLocation),
           frame: bounds))
     }
diff --git a/Sources/Public/CalendarViewContent.swift b/Sources/Public/CalendarViewContent.swift
index 8737231..176cd9b 100644
--- a/Sources/Public/CalendarViewContent.swift
+++ b/Sources/Public/CalendarViewContent.swift
@@ -338,7 +338,7 @@ public final class CalendarViewContent {
     for dateRanges: Set<ClosedRange<Date>>,
     _ dayRangeItemProvider: @escaping (
       _ dayRangeLayoutContext: DayRangeLayoutContext)
-      -> AnyCalendarItemModel?)
+      -> AnyCalendarItemModel)
     -> CalendarViewContent
   {
     let dayRanges = Set(dateRanges.map { DayRange(containing: $0, in: calendar) })
@@ -366,7 +366,7 @@ public final class CalendarViewContent {
     for overlaidItemLocations: Set<OverlaidItemLocation>,
     _ overlayItemProvider: @escaping (
       _ overlayLayoutContext: OverlayLayoutContext)
-      -> AnyCalendarItemModel?)
+      -> AnyCalendarItemModel)
     -> CalendarViewContent
   {
     overlaidItemLocationsAndItemProvider = (overlaidItemLocations, overlayItemProvider)
@@ -398,10 +398,10 @@ public final class CalendarViewContent {
   private(set) var monthBackgroundItemProvider: ((MonthLayoutContext) -> AnyCalendarItemModel?)?
   private(set) var dayRangesAndItemProvider: (
     dayRanges: Set<DayRange>,
-    dayRangeItemProvider: (DayRangeLayoutContext) -> AnyCalendarItemModel?)?
+    dayRangeItemProvider: (DayRangeLayoutContext) -> AnyCalendarItemModel)?
   private(set) var overlaidItemLocationsAndItemProvider: (
     overlaidItemLocations: Set<OverlaidItemLocation>,
-    overlayItemProvider: (OverlayLayoutContext) -> AnyCalendarItemModel?)?
+    overlayItemProvider: (OverlayLayoutContext) -> AnyCalendarItemModel)?
 
   /// The default `monthHeaderItemProvider` if no provider has been configured,
   /// or if the existing provider returns nil.
diff --git a/Tests/CalendarContentTests.swift b/Tests/CalendarContentTests.swift
index 22da1b4..abf6864 100644
--- a/Tests/CalendarContentTests.swift
+++ b/Tests/CalendarContentTests.swift
@@ -22,12 +22,6 @@ final class CalendarContentTests: XCTestCase {
     .dayBackgroundItemProvider { _ in
       nil
     }
-    .dayRangeItemProvider(for: Set([Date.distantPast...Date.distantFuture])) { _ in
-      nil
-    }
-    .overlayItemProvider(for: Set([.day(containingDate: .distantPast)])) { _ in
-      nil
-    }
   }
 
   func testNilDayItemUsesDefaultValue() {