For Standard and Enterprise Edition events, the main CMS Admin on your team has been invited to Asana, our project management tool. If you do not have access to Asana or were not invited, please contact your CRM. 

Core dates are also included directly in the CMS > Home > Project Settings.

Express and DIY Editions do not have a milestone timeline as the app is already in the app stores. Your content is published into these apps and you can use the CMS to publish updates as you have time.