diff --git a/lib/weekly.js b/lib/weekly.js
index ea91d12..5d7fc1a 100644
--- a/lib/weekly.js
+++ b/lib/weekly.js
@@ -38,6 +38,7 @@
     },
 
     init: function() {
+      var self = this;
       this.events = [];
 
       this.oldDate = this.currentDate;
@@ -60,11 +61,17 @@
       this.hoverPreviewTimer = null;
       if(this.hoverPreviewDelay !== false) {
         this.el.on('mousemove', '.weekly-day', this.proxy(function(e) {
+          if (self.readOnly) {
+            return;
+          }
           this.removePreviewEvent();
           this.hoverPreviewTimer = setTimeout(this.proxy(function() {
             this.showPreviewEvent(e);
           }), this.hoverPreviewDelay);
         })).on('mouseleave', '.weekly-day', this.proxy(function() {
+          if (self.readOnly) {
+            return;
+          }
           this.removePreviewEvent();
         }));
       }