diff --git a/roles/backup-vm/ths_cal_backup.sh b/roles/backup-vm/ths_cal_backup.sh
new file mode 100644
index 0000000..c8dc170
--- /dev/null
+++ b/roles/backup-vm/ths_cal_backup.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+BACKUP_NAME=backup_$(date +%Y%m%d).zip
+mkdir -p ~/ths_caldav_backups/
+vdirsyncer -c vsyncdir.conf sync
+zip -q -r ~/ths_caldav_backups/${BACKUP_NAME} ~/ths-caldav
+~/backups/backup-tools/backup_manager.py ~/ths_caldav_backups/ --debug
+
+curl -H "Content-Type: application/json" \
+     -X POST https://async-icinga.atlantishq.de/ \
+     -d '{ "service" : "ths_caldav_backup", "token" : "HISTORY_PURGED_SECRET", "status" : "OK", "info" : "" }'
diff --git a/roles/monitoring-master/files/services_async.conf b/roles/monitoring-master/files/services_async.conf
index 5a430e8..6e2515a 100644
--- a/roles/monitoring-master/files/services_async.conf
+++ b/roles/monitoring-master/files/services_async.conf
@@ -171,3 +171,12 @@ apply Service "mail_atlantishq" {
     vars.service_name = "mail_atlantishq"
     assign where host.name == "async_icinga"
 }
+
+apply Service "ths_caldav_backup" {
+    import "generic-service"
+    check_command = "gateway"
+    vars.protocol = "https"
+    vars.host = "async-icinga.atlantishq.de"
+    vars.service_name = "ths_caldav_backup"
+    assign where host.name == "async_icinga"
+}