To check the registration time of Tik Tok, open Tik Tok APP, enter the "Me" page, click the three bar icons in the upper right corner, and select the "Settings" option in the pop-up menu. Find the related options such as "data management" or "account number and security" on the settings page, and click enter to see the options such as "account information" or "personal information".
Find the relevant information such as "registration time" or "account registration time" in the options, and the registration time of Tik Tok will appear.