Claire, Gloria, Mitchell and Cameron take Haley to a bar so she can have her first drink, while Phil wants to buy her a car as a gift.
Elsewhere, Phil (Ty Burrell) plans to buy a car as a gift for Haley and tries to make the deal with the salesman.
Claire tries to convince her that she has to get one too, otherwise it will look like her tattoo is dedicated to her mother DeDe, but Phil arrives with the new car and Haley leaves.
Meanwhile, Alex (Ariel Winter), Luke (Nolan Gould) and Manny (Rico Rodriguez) stay home and babysit Lily (Aubrey Anderson-Emmons), who puts them in an awkward position when she starts asking them if they know how babies are made.
Leigh Raines from TV Fanatic rated the episode with 5/5 saying that it marked the celebration of Haley's momentous birthday with her family.
[...] While “Birthday” has peppery lines sprinkled throughout, it’s tough to focus on them when they’re deployed as part of stories that never manage to make much sense.