diff --git a/packages/core/database/backup.js b/packages/core/database/backup.js
index a7491822c..2fdbd3669 100644
--- a/packages/core/database/backup.js
+++ b/packages/core/database/backup.js
@@ -1,7 +1,7 @@
 import Hashes from "jshashes";
 const sha256 = new Hashes.SHA256();
 
-const invalidKeys = ["user", "t"];
+const invalidKeys = ["user", "t", "lastBackup"];
 const validTypes = ["mobile", "web", "node"];
 export default class Backup {
   /**
@@ -12,6 +12,10 @@ export default class Backup {
     this._db = db;
   }
 
+  lastBackupTime() {
+    return this._db.context.read("lastBackupTime");
+  }
+
   /**
    *
    * @param {"web"|"mobile"|"node"} type
@@ -37,6 +41,9 @@ export default class Backup {
       });
     }
 
+    // save backup time
+    await this._db.context.write("lastBackupTime", Date.now());
+
     return JSON.stringify({
       type,
       date: Date.now(),