diff --git a/Sources/JTAppleCalendarView.swift b/Sources/JTAppleCalendarView.swift
index 573c41b8..32e0aa17 100644
--- a/Sources/JTAppleCalendarView.swift
+++ b/Sources/JTAppleCalendarView.swift
@@ -124,8 +124,8 @@ open class JTAppleCalendarView: UICollectionView {
         }
     }
     
-    func setupMonthInfoAndMap() {
-        theData = setupMonthInfoDataForStartAndEndDate()
+    func setupMonthInfoAndMap(with data: ConfigurationParameters? = nil) {
+        theData = setupMonthInfoDataForStartAndEndDate(with: data)
     }
     
     // Configuration parameters from the dataSource
@@ -402,8 +402,8 @@ open class JTAppleCalendarView: UICollectionView {
     }
     
     // Only reload the dates if the datasource information has changed
-    func reloadDelegateDataSource() -> Bool {
-        var retval = false
+    func reloadDelegateDataSource() -> (shouldReload: Bool, configParameters: ConfigurationParameters?) {
+        var retval: (Bool, ConfigurationParameters?) = (false, nil)
         if let
             newDateBoundary = calendarDataSource?.configureCalendar(self) {
             // Jt101 do a check in each var to see if
@@ -424,7 +424,7 @@ open class JTAppleCalendarView: UICollectionView {
                 lastMonthSize != newLastMonth ||
                 calendarViewLayout.updatedLayoutCellSize != calendarViewLayout.cellSize {
                     lastMonthSize = newLastMonth
-                    retval = true
+                    retval = (true, newDateBoundary)
             }
         }
         
@@ -617,12 +617,15 @@ extension JTAppleCalendarView {
         return retval
     }
     
-    func setupMonthInfoDataForStartAndEndDate() -> CalendarData {
+    func setupMonthInfoDataForStartAndEndDate(with config: ConfigurationParameters? = nil) -> CalendarData {
         var months = [Month]()
         var monthMap = [Int: Int]()
         var totalSections = 0
         var totalDays = 0
-        if let validConfig = calendarDataSource?.configureCalendar(self) {
+        
+        var validConfig = config
+        if validConfig == nil { validConfig = calendarDataSource?.configureCalendar(self) }
+        if let validConfig = validConfig {
             let comparison = validConfig.calendar.compare(validConfig.startDate, to: validConfig.endDate, toGranularity: .nanosecond)
             if comparison == ComparisonResult.orderedDescending {
                 assert(false, "Error, your start date cannot be greater than your end date\n")
diff --git a/Sources/UserInteractionFunctions.swift b/Sources/UserInteractionFunctions.swift
index cf21d28c..aa5a71bd 100644
--- a/Sources/UserInteractionFunctions.swift
+++ b/Sources/UserInteractionFunctions.swift
@@ -171,10 +171,10 @@ extension JTAppleCalendarView {
         initialScrollDate = date
         
         let selectedDates = self.selectedDates
-        let layoutNeedsUpdating = reloadDelegateDataSource()
-        if layoutNeedsUpdating {
+        let data = reloadDelegateDataSource()
+        if data.shouldReload {
             calendarViewLayout.invalidateLayout()
-            setupMonthInfoAndMap()
+            setupMonthInfoAndMap(with: data.configParameters)
             
             self.theSelectedIndexPaths = []
             self.theSelectedDates = []
@@ -192,7 +192,7 @@ extension JTAppleCalendarView {
             delayedExecutionClosure.append(validCompletionHandler)
         }
         
-        if !layoutNeedsUpdating { calendarViewLayout.shouldClearCacheOnInvalidate = false }
+        if !data.shouldReload { calendarViewLayout.shouldClearCacheOnInvalidate = false }
         super.reloadData()
         isReloadDataInProgress = false