In 2026, Disney+ requires your birthdate primarily for legal compliance and ad personalization. Under the Children's Online Privacy Protection Act (COPPA) in the U.S., Disney must verify that the account holder is an adult (18+) to manage billing and consent. Furthermore, with the expansion of the ad-supported tier, Disney uses your age to ensure that the commercials you see are relevant to your demographic; for example, they won't show luxury car ads to a child's profile. Your birthdate also helps Disney+ set the default Content Rating for each profile, preventing younger users from accessing R-rated or TV-MA content without a parental PIN. While it may feel invasive, Disney's 2026 privacy policy states that this data is used to "Personalize the Experience," ensuring that the algorithm suggests content that matches your age group, thereby increasing the high-value utility of the streaming platform.