Did we just find out Jack Blues Bieber’s birthday? A friend of Justin and Hailey Bieber accidentally revealed the apparent date the model gave birth less than one week after the “Sorry” singer announced via Instagram on Friday, August 23, that he and his wife had welcomed their first child together. Jack’s possible birthdate was spilled in the comments section of a post shared by the couple’s friend Adwoa Aboah, who gave birth to her and her boyfriend Daniel Wheatley’s daughter the same day Justin confirmed his son was home from the hospital. Adwoa captioned a series of Instagram images: “Our …