Deleted contact's birthday keeps showing each year

The birthday was attached to a former google contact. iphone is set to show calendar birthdays that are in google contacts. However, when a google contact is deleted, iphone continues to announce the birthday on it's calendar, while google calendar on a pc does not show the birthday. My ignorant guess = icloud is storing the previous google contact (including birthday) and deleting that contact from Google doesn't delete icloud. Any help would be appreciated.