When you sign up for Tumblr, we determine your year of birth and record it in our database. We use this information in a couple of different ways.
First of all, if you’re a resident of the European Union, as of May 25, 2018, you must be at least 16 years old (or the lower age that your country has provided for you to consent to the processing of your personal data) in order to use Tumblr. In a number of European countries, legislation to change the minimum age is pending. We are carefully monitoring this legislation in case the minimum age in your country changes. In all other regions, you must be at least 13 years old to use Tumblr. No exceptions.
Additionally, you must be at least 18 years old to turn off Safe Mode. If you’re under the age of 18, Safe Mode is enabled for you and you can’t disable it.
We calculate your age according to your year of birth. To figure out if you’re 18, our system takes your birth year and subtracts it from the current year. So to be considered “over 18” by our system in 2018, you need to have indicated that your birth year was 2000 or earlier when you signed up.
In other words, if you registered in 2018 and were born in 2001, you’ll be able to turn off Safe Mode at the stroke of midnight on January 1st, 2019.
We are unable to update your age in our system.