diff --git a/modules/default/calendar/README.md b/modules/default/calendar/README.md
index b272a2d2..e3938bda 100755
--- a/modules/default/calendar/README.md
+++ b/modules/default/calendar/README.md
@@ -52,6 +52,8 @@ The following properties can be configured:
 | `hidePrivate`                | Hides private calendar events. <br><br> **Possible values:** `true` or `false` <br> **Default value:** `false`
 | `hideOngoing`                | Hides calendar events that have already started. <br><br> **Possible values:** `true` or `false` <br> **Default value:** `false`
 | `excludedEvents`             | An array of words / phrases from event titles that will be excluded from being shown. <br><br>Additionally advanced filter objects can be passed in. Below is the configuration for the advance filtering object.<br>**Required**<br>`filterBy` - string used to determine if filter is applied.<br>**Optional**<br>`until` - Time before an event to display it  Ex: [`'3 days'`, `'2 months'`, `'1 week'`]<br>`caseSensitive` - By default, excludedEvents are case insensitive, set this to true to enforce case sensitivity<br>`regex` - set to `true` if filterBy is a regex. For those not familiar with regex it is used for pattern matching, please see [here](https://regexr.com/) for more info.<br><br> **Example:** `['Birthday', 'Hide This Event', {filterBy: 'Payment', until: '6 days', caseSensitive: true}, {filterBy: '^[0-9]{1,}.*', regex: true}]` <br> **Default value:** `[]`
+| `sliceMultiDayEvents`        | If this is set to true, events exceeding at least one midnight will be sliced into separate events including a counter like (1/2). This is especially helpful in "dateheaders" mode. Events will be sliced at midnight, end time for all events but the last will be 23:59 **Default value:** `true`
+
 
 ### Calendar configuration
 
diff --git a/modules/default/calendar/calendar.js b/modules/default/calendar/calendar.js
index 38b04269..2023b79a 100755
--- a/modules/default/calendar/calendar.js
+++ b/modules/default/calendar/calendar.js
@@ -46,7 +46,8 @@ Module.register("calendar", {
 			"'s birthday": ""
 		},
 		broadcastEvents: true,
-		excludedEvents: []
+		excludedEvents: [],
+		sliceMultiDayEvents: false
 	},
 
 	// Define required scripts.
@@ -447,7 +448,31 @@ Module.register("calendar", {
 				}
 				event.url = c;
 				event.today = event.startDate >= today && event.startDate < (today + 24 * 60 * 60 * 1000);
-				events.push(event);
+
+				/* if sliceMultiDayEvents is set to true, multiday events (events exceeding at least one midnight) are sliced into days,
+				* otherwise, esp. in dateheaders mode it is not clear how long these events are.
+				*/
+				if (this.config.sliceMultiDayEvents) {
+					var midnight = moment(event.startDate, "x").clone().startOf("day").add(1, "day").format("x");			//next midnight
+					var count = 1;
+					var maxCount = Math.ceil(((event.endDate - 1) - moment(event.startDate, "x").endOf('day').format("x"))/(1000*60*60*24)) + 1
+					if (event.endDate > midnight) {
+						while (event.endDate > midnight) {
+							var nextEvent = JSON.parse(JSON.stringify(event));	//make a copy without reference to the original event
+ 							nextEvent.startDate = midnight;
+ 							event.endDate = midnight;
+ 							event.title += " ("+count+"/"+maxCount+")";
+ 							events.push(event);
+ 							event = nextEvent;
+ 							count += 1;
+ 							midnight = moment(midnight, "x").add(1, "day").format("x");		//move further one day for next split
+ 						}
+ 						event.title += " ("+count+"/"+maxCount+")";
+ 					}
+					events.push(event);
+				} else {
+					events.push(event);
+				}
 			}
 		}