diff --git a/src/fn/compile-app-settings.js b/src/fn/compile-app-settings.js
index 45904cbc9..b97fd9976 100644
--- a/src/fn/compile-app-settings.js
+++ b/src/fn/compile-app-settings.js
@@ -72,6 +72,7 @@ const compileAppSettingsForProject = async (projectDir, options) => {
     }
     return maxTaskNotifications;
   };
+  const isValidTimeFormat = (time) => /^([01]\d|2[0-3]):[0-5]\d$/.test(time);
 
   // Fail if no eslintrc file is found
   if (!fs.exists(esLintFilePath)) {
@@ -142,6 +143,16 @@ const compileAppSettingsForProject = async (projectDir, options) => {
     delete appSettings.max_task_notifications;
   }
 
+  if (appSettings.task_notification_window) {
+    const startTime = appSettings.task_notification_window.start;
+    const endTime = appSettings.task_notification_window.end;
+    if (!isValidTimeFormat(startTime) || !isValidTimeFormat(endTime)) {
+      throw new Error(`Invalid task notification window time`);
+    }
+    appSettings.tasks.task_notification_window = appSettings.task_notification_window;
+    delete appSettings.task_notification_window;
+  }
+
   const purgeConfig = parsePurge(projectDir);
   if (purgeConfig) {
     appSettings.purge = purgeConfig;
diff --git a/test/data/compile-app-settings/task-notifications/app_settings.expected.json b/test/data/compile-app-settings/task-notifications/app_settings.expected.json
index e104b6a4c..fdbebb691 100644
--- a/test/data/compile-app-settings/task-notifications/app_settings.expected.json
+++ b/test/data/compile-app-settings/task-notifications/app_settings.expected.json
@@ -5,7 +5,11 @@
   "tasks": {
     "rules": "",
     "targets": {},
-    "max_task_notifications": 25
+    "max_task_notifications": 25,
+    "task_notification_window": {
+      "start": "08:00",
+      "end": "19:00"
+    }
   },
   "purge": {}
 }
diff --git a/test/data/compile-app-settings/task-notifications/invalid-notification-window/.eslintrc b/test/data/compile-app-settings/task-notifications/invalid-notification-window/.eslintrc
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/data/compile-app-settings/task-notifications/invalid-notification-window/app_settings/base_settings.json b/test/data/compile-app-settings/task-notifications/invalid-notification-window/app_settings/base_settings.json
new file mode 100644
index 000000000..618517484
--- /dev/null
+++ b/test/data/compile-app-settings/task-notifications/invalid-notification-window/app_settings/base_settings.json
@@ -0,0 +1,9 @@
+{
+  "locale": "en",
+  "forms": {},
+  "max_task_notifications": 25,
+  "task_notification_window": {
+    "start": "08:00",
+    "end": "25:99"
+  }
+}
\ No newline at end of file
diff --git a/test/data/compile-app-settings/task-notifications/invalid-notification-window/contact-summary.js b/test/data/compile-app-settings/task-notifications/invalid-notification-window/contact-summary.js
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/data/compile-app-settings/task-notifications/invalid-notification-window/rules.nools.js b/test/data/compile-app-settings/task-notifications/invalid-notification-window/rules.nools.js
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/data/compile-app-settings/task-notifications/invalid-notification-window/targets.json b/test/data/compile-app-settings/task-notifications/invalid-notification-window/targets.json
new file mode 100644
index 000000000..0967ef424
--- /dev/null
+++ b/test/data/compile-app-settings/task-notifications/invalid-notification-window/targets.json
@@ -0,0 +1 @@
+{}
diff --git a/test/data/compile-app-settings/task-notifications/project/app_settings/base_settings.json b/test/data/compile-app-settings/task-notifications/project/app_settings/base_settings.json
index b233c1fb2..34bb1fd2c 100644
--- a/test/data/compile-app-settings/task-notifications/project/app_settings/base_settings.json
+++ b/test/data/compile-app-settings/task-notifications/project/app_settings/base_settings.json
@@ -1,5 +1,9 @@
 {
   "locale": "en",
   "forms": {},
-  "max_task_notifications": 25
+  "max_task_notifications": 25,
+  "task_notification_window": {
+    "start": "08:00",
+    "end": "19:00"
+  }
 }
\ No newline at end of file
diff --git a/test/fn/compile-app-settings.spec.js b/test/fn/compile-app-settings.spec.js
index 96a9e1db6..9d9ee0fa7 100644
--- a/test/fn/compile-app-settings.spec.js
+++ b/test/fn/compile-app-settings.spec.js
@@ -70,6 +70,10 @@ const scenarios = [
     description: 'should handle a configuration using the assetlinks.json file',
     folder: 'android-app-links/project',
   },
+  {
+    description: 'should compile max_task_notifications to tasks.max_task_notifications',
+    folder: 'task-notifications/project',
+  },
 
   // REJECTION SCENARIOS
   {
@@ -128,8 +132,9 @@ const scenarios = [
     error: 'Invalid assetlinks: ValidationError: "[0].target.sha256_cert_fingerprints" is required',
   },
   {
-    description: 'should compile max_task_notifications to tasks.max_task_notifications',
-    folder: 'task-notifications/project',
+    description: 'should reject a task notification window with an invalid time format',
+    folder: 'task-notifications/invalid-notification-window',
+    error: 'Invalid task notification window time',
   }
 ];