diff --git a/theengsgateway/DOCS.md b/theengsgateway/DOCS.md
index 821457d..3237a55 100644
--- a/theengsgateway/DOCS.md
+++ b/theengsgateway/DOCS.md
@@ -26,5 +26,7 @@ DISCOVERY_DEVICE_NAME | string | No | Device name `TheengsGateway`
 DISCOVERY_FILTER | string | No | Excluded BLE devices models `[IBEACON,GAEN,MS-CDP]`
 ADAPTER | string | No | Bluetooth adapter (e.g. hci1 on Linux)
 SCANNING_MODE | string | No | Change scanning mode between `active` and `passive`, defaults to `active`
+TIME_SYNC | string | No | Addresses of BLE devices to synchronize time (defaults to the empty list `[]`)
+TIME_FORMAT | boolean | No | Use 12-hour (`yes`) or 24-hour (`no`) time format for clocks (defaults to `no`)
 
-For more details please refer to [TheengsGateway](https://theengs.github.io/gateway/).
\ No newline at end of file
+For more details please refer to [TheengsGateway](https://theengs.github.io/gateway/).
diff --git a/theengsgateway/config.json b/theengsgateway/config.json
index 2f0c5ec..1e1de94 100644
--- a/theengsgateway/config.json
+++ b/theengsgateway/config.json
@@ -29,7 +29,9 @@
     "DISCOVERY_DEVICE_NAME": "TheengsGateway",
     "DISCOVERY_FILTER": "[IBEACON,GAEN,MS-CDP]",
     "ADAPTER": "",
-    "SCANNING_MODE": "active"
+    "SCANNING_MODE": "active",
+    "TIME_SYNC": "[]",
+    "TIME_FORMAT": false
   },
   "schema": {
     "MQTT_HOST": "str",
@@ -47,6 +49,8 @@
     "DISCOVERY_DEVICE_NAME": "str?",
     "DISCOVERY_FILTER": "str?",
     "ADAPTER": "str?",
-    "SCANNING_MODE": "str?"
+    "SCANNING_MODE": "str?",
+    "TIME_SYNC": "str?",
+    "TIME_FORMAT": "bool?"
   }
 }
diff --git a/theengsgateway/run.sh b/theengsgateway/run.sh
index 1e45a1f..f35bf62 100644
--- a/theengsgateway/run.sh
+++ b/theengsgateway/run.sh
@@ -21,6 +21,8 @@ DISCOVERY_TOPIC=$(bashio::config 'DISCOVERY_TOPIC')
 DISCOVERY_DEVICE_NAME=$(bashio::config 'DISCOVERY_DEVICE_NAME')
 DISCOVERY_FILTER=$(bashio::config 'DISCOVERY_FILTER')
 ADAPTER=$(bashio::config 'ADAPTER')
+TIME_SYNC=$(bashio::config 'TIME_SYNC')
+TIME_FORMAT=$(bashio::config 'TIME_FORMAT')
 
 {
     echo "{"
@@ -38,7 +40,9 @@ ADAPTER=$(bashio::config 'ADAPTER')
     echo "    \"discovery_topic\": \"${DISCOVERY_TOPIC}\","
     echo "    \"discovery_device_name\": \"${DISCOVERY_DEVICE_NAME}\","
     echo "    \"discovery_filter\": \"${DISCOVERY_FILTER}\","
-    echo "    \"adapter\": \"${ADAPTER}\""
+    echo "    \"adapter\": \"${ADAPTER}\"",
+    echo "    \"time_sync\": \"${TIME_SYNC}\"",
+    echo "    \"time_format\": \"${TIME_FORMAT}\"",
     echo "}"
 } > "${CONFIG}"