I noticed that the Graph API (e.g. GET https://graph.facebook.com/UID) returns relationship_status and significant_other, but does not return an anniversary date for the relationship even if one is present.
Is it possible to see this via the Graph (or even REST) API?
EDIT: There is no API for the same. Instead you could simply screen scrape the user’s profile page where anniversary is listed on the bottom. Much easier but its a violation of Facebook’s term.
There is no way to get this right now, hope for an update of the API.
The unofficial only ways would be screen scraping or parsing all posts on the users wall but both ways are not every efficient and screen scraping is not even allowed by the terms of Facebook.