As the calendar flips over from 2017 to 2018, we figure this is a good time for a reminder about how age is recorded on Tumblr. To take a paragraph from our Age on Tumblr article:
Since we go by your birth year and not your exact birthday, you may need to wait until the January 1 of the following calendar year before you can disable Safe Mode. For example, if you said you were 14 when you registered in 2015, you'll have to wait until January 1, 2019. Note that if you registered before your birthday that year, your age will be rounded down in our system.
For a little more information on this, check out our Age on Tumblr article here: https://tumblr.zendesk.com/hc/articles/115010913287-Age-on-Tumblr