diff --git a/actions.js b/actions.js
index 49ca980..0415239 100644
--- a/actions.js
+++ b/actions.js
@@ -20,3 +20,20 @@ export function setTheme(theme) {
 		theme: theme,
 	};
 }
+
+
+export function addTimetableEntry(day, entry) {
+	return {
+		type: "ADD_TIMETABLE_ENTRY",
+		day,
+		entry,
+	};
+}
+
+
+export function removeTimetableEntry(id) {
+	return {
+		type: "REMOVE_TIMETABLE_ENTRY",
+		id: id
+	};
+}
diff --git a/reducers/timetable.js b/reducers/timetable.js
index 0d5b032..70e175e 100644
--- a/reducers/timetable.js
+++ b/reducers/timetable.js
@@ -1,4 +1,6 @@
-export default function timetable(state) {
+import { v4 } from "react-native-uuid";
+
+export default function timetable(state, action) {
 	if (typeof state === "undefined")
 		// Array of days starting with Sunday
 		return [
@@ -10,5 +12,17 @@ export default function timetable(state) {
 			[],
 			[],
 		];
-	return state;
+	switch (action.type) {
+	case "ADD_TIMETABLE_ENTRY":
+		return [
+			...(state.slice(0, action.day)),
+			[...state[action.day], {
+				...action.entry,
+				id: v4()
+			}],
+			...(state.slice(action.day + 1))
+		];
+	default:
+		return state;
+	}
 }