diff --git a/README.md b/README.md
index 3f19a70..593b299 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,9 @@ AH_PASSWORD=password
 TZ=Europe/Amsterdam
 STORE_PATH=/db
 
+
+CALENDAR_NOTIFY_MINUTES=15,120 # In minutes, use a "," to use multiple reminders
+
 ```
 
 ### Calendar Synchronization
diff --git a/src/utils/server/createIcs.ts b/src/utils/server/createIcs.ts
index e6d2d89..bad9daf 100644
--- a/src/utils/server/createIcs.ts
+++ b/src/utils/server/createIcs.ts
@@ -10,6 +10,7 @@ export interface IcsEvent {
 	end: DateTime;
 	description: string;
 	summary: string;
+	alarms: number[];
 }
 
 const formatTime = (date: DateTime): string =>
@@ -32,6 +33,16 @@ export const createIcs = (
 	];
 
 	events.forEach((event) => {
+		const alarms = event.alarms.map((alarm) =>
+			[
+				"BEGIN:VALARM",
+				`TRIGGER:-PT${alarm}M`,
+				"ACTION:DISPLAY",
+				`DESCRIPTION:${event.summary}`,
+				"END:VALARM"
+			].join("\r\n")
+		);
+
 		ics.push(
 			...[
 				"BEGIN:VEVENT",
@@ -42,6 +53,7 @@ export const createIcs = (
 				`DESCRIPTION:${event.description}`,
 				"STATUS:CONFIRMED",
 				`UID:${event.end.toMillis() + "-" + event.start.toMillis()}`,
+				...alarms,
 				"END:VEVENT"
 			]
 		);
diff --git a/src/utils/server/env.ts b/src/utils/server/env.ts
index d1b5c80..3c5124f 100644
--- a/src/utils/server/env.ts
+++ b/src/utils/server/env.ts
@@ -12,3 +12,10 @@ export const storePath = env.STORE_PATH
 export const timesheetCacheDuration = env.TIMESHEET_CACHE
 	? +env.TIMESHEET_CACHE
 	: 3600;
+
+export const calendarNotifyMinutes = (
+	process.env.CALENDAR_NOTIFY_MINUTES ?? "60"
+)
+	.split(",")
+	.map((i) => parseInt(i))
+	.filter(Boolean);
diff --git a/src/utils/server/timesheetToIcs.ts b/src/utils/server/timesheetToIcs.ts
index 837ec07..125ad73 100644
--- a/src/utils/server/timesheetToIcs.ts
+++ b/src/utils/server/timesheetToIcs.ts
@@ -1,3 +1,5 @@
+import { calendarNotifyMinutes } from "./env";
+
 import { DateTime } from "luxon";
 
 import { createIcs, IcsEvent } from "@server";
@@ -12,7 +14,8 @@ export const timesheetToIcs = (timesheet: LuxonTimesheet): string => {
 
 		description: `Geüpdated op ${timesheet.updated
 			.setLocale("nl")
-			.toLocaleString(DateTime.DATETIME_MED)}`
+			.toLocaleString(DateTime.DATETIME_MED)}`,
+		alarms: calendarNotifyMinutes
 	}));
 
 	return createIcs({ name: "Shifts", updated: timesheet.updated }, events);