We haven't gotten a release date for Cadence of Hyrule yet, other than Spring 2019. While we still don't have a specific date, it looks like we might be getting the title sometime this month.
Nintendo has sent out a 'What to expect in May!' email in some regions, and included in the email is Cadence of Hyrule. It would certainly be nice to see the game come out this month, but technically Nintendo has until June 20th to launch the game, as Summer doesn't kick off until June 21st, 2019.