This is probably old news by now... since your post is from 2013.
But you need to add the time widget when creating/editing a web application.
Angemeldete Mitglieder können Beiträge verfassen, Updates folgen und mehr. Neu hier? Registriere ein kostenloses Konto.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.