I want to make a few changes to my profile. But for some reason I’m not able to change my name, email or birthday. How can I do it?

There are some parts of the user profile that cannot be edited by users themselves. Details such as name, email, or birthday can be only changed by the site administrator. If you want to change these details and update them, you need to request your site administrator to make that change. All other parts of your profile can be edited by you.