I have a death certificate from 1851 which gives the age but not date of birth, but this was following a coroner's inquest, who was the informant so may not be typical.
William Jacobs, male, age 45 years, Labourer. Injury against a tree while holding a colt on the 9th June from the effects of which he died on 11th. "Accidental". Jim Barnett, County Coroner, Cheltenham.