Due to the floating timeline, Homer's age has changed occasionally as the series developed; he was 34 in the early episodes, 36 in season four, 38 and 39 in season eight, and 40 in the eighteenth season, although even in those seasons his age is inconsistent. In the fourth season episode "Duffless", Homer's drivers license shows his birthdate of being May 12, 1956, which would have made him 36 years old at the time of the episode. During Bill Oakley and Josh Weinstein's period as showrunners, they found that as they aged, Homer seemed to become older too, so they increased his age to 38. His height is 6' (1.83 m).