HolidaySync v1.0.0.0 is out
Holiday Sync is an App which allows the importing of public holidays from an online source, this app was developed for Project Conference 2014 to showcase JavaScript, read more about it here: Extending Project Online and on-premises with JavaScript Apps
Version 1.0.0.0 is available now on the SharePoint App Store.
See the Holiday Sync App page for support and more info on the App.