diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt
index 466225d96..a9137cf0b 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt
@@ -121,8 +121,12 @@ class SettingsActivity : SimpleActivity() {
                     toggleGoogleSync()
                 }
             } else {
-                ConfirmationDialog(this, getString(R.string.google_sync_testing), positive = R.string.ok, negative = 0) {
-                    toggleGoogleSync()
+                if (isOnline()) {
+                    ConfirmationDialog(this, getString(R.string.google_sync_testing), positive = R.string.ok, negative = 0) {
+                        toggleGoogleSync()
+                    }
+                } else {
+                    toast(R.string.cannot_while_offline)
                 }
             }
         }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
index 24b212bd2..eb367fef2 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
@@ -10,6 +10,7 @@ import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
 import android.graphics.Color
+import android.net.ConnectivityManager
 import android.net.Uri
 import android.os.Build
 import android.support.v7.app.NotificationCompat
@@ -239,6 +240,11 @@ fun Context.getGoogleSyncService(): com.google.api.services.calendar.Calendar {
             .build()
 }
 
+fun Context.isOnline(): Boolean {
+    val connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+    return connectivityManager.activeNetworkInfo != null
+}
+
 fun Context.getNewEventTimestampFromCode(dayCode: String) = Formatter.getLocalDateTimeFromCode(dayCode).withTime(13, 0, 0, 0).seconds()
 
 fun Context.getCurrentOffset() = SimpleDateFormat("Z", Locale.getDefault()).format(Date())
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 95d6a98c8..26d166867 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 31836b2b3..b997d42da 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 9af65a3ac..b57498ee3 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-hi-rIN/strings.xml b/app/src/main/res/values-hi-rIN/strings.xml
index c06b97db1..db14db958 100644
--- a/app/src/main/res/values-hi-rIN/strings.xml
+++ b/app/src/main/res/values-hi-rIN/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-hu/strings.xml b/app/src/main/res/values-hu/strings.xml
index 7e959e339..d720c8837 100644
--- a/app/src/main/res/values-hu/strings.xml
+++ b/app/src/main/res/values-hu/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index e9cab8f5f..fe8bdcb90 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-iw/strings.xml b/app/src/main/res/values-iw/strings.xml
index c7b056727..eba6f5625 100644
--- a/app/src/main/res/values-iw/strings.xml
+++ b/app/src/main/res/values-iw/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 265001d1b..b715bf31a 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index ec59510c9..86ef7c876 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-pt/strings.xml b/app/src/main/res/values-pt/strings.xml
index ae05b1c8d..e5bd23767 100644
--- a/app/src/main/res/values-pt/strings.xml
+++ b/app/src/main/res/values-pt/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Mostrar eventos passados</string>
     <string name="snooze_delay">Adiar lembrete com a opção Snooze</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">A sincronização Google ainda não está terminada. Reporte os erros encontrados para hello@simplemobiletools.com. Obrigado!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index db4993baf..8497af17f 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -203,6 +203,7 @@
     <string name="display_past_events">Показывать прошедшие события</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-sk/strings.xml b/app/src/main/res/values-sk/strings.xml
index a5e675c4a..300c2521e 100644
--- a/app/src/main/res/values-sk/strings.xml
+++ b/app/src/main/res/values-sk/strings.xml
@@ -196,6 +196,7 @@
     <string name="display_past_events">Zobraziť minulé udalosti spred</string>
     <string name="snooze_delay">Posunúť pripomienku s Odložiť o</string>
     <string name="widgets">Widgety</string>
+    <string name="cannot_while_offline">Nemôžete to urobiť bez internetu.</string>
     <string name="google_sync_testing">Google synchronizácia je v testovacej prevádzke, buďte opatrní pri spoliehaní sa na ňu. Nahlásenie akýchkoľvek ohlasov na hello@simplemobiletools.com je vítané. Vďaka!</string>
     <string name="google_sync_existing">Odoslať lokálne vytvorené udalosti do oblakov?</string>
     <string name="google_sync_disabling">Vypnutie Google synchonizácie odstráni všetky synchronizované udalosti zo zariadenia, no v oblakoch ostanú nedotknuté.</string>
diff --git a/app/src/main/res/values-sv/strings.xml b/app/src/main/res/values-sv/strings.xml
index e61565a35..9f9f719a7 100644
--- a/app/src/main/res/values-sv/strings.xml
+++ b/app/src/main/res/values-sv/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Visa tidigare händelser</string>
     <string name="snooze_delay">Skjut upp påminnelse med Snooza</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values-tr/strings.xml b/app/src/main/res/values-tr/strings.xml
index 66019a60a..be6d5c62b 100644
--- a/app/src/main/res/values-tr/strings.xml
+++ b/app/src/main/res/values-tr/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 386f3925e..8c9c748ef 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -189,6 +189,7 @@
     <string name="display_past_events">Display events from the past</string>
     <string name="snooze_delay">Postpone reminder with Snooze by</string>
     <string name="widgets">Widgets</string>
+    <string name="cannot_while_offline">You cannot do that while offline.</string>
     <string name="google_sync_testing">Google sync is in a testing mode, please be cautions when relying on it. Reporting any feedback at hello@simplemobiletools.com would be appreciated. Thanks!</string>
     <string name="google_sync_existing">Send locally created events to the cloud?</string>
     <string name="google_sync_disabling">Disabling Google sync will delete all synced events from your device, while leaving them intact in the cloud.</string>