If you want to hide your birth of date and keep it private from friends or public, you can follow these easy steps:
First start by logging into your Hotmail account 🙂
Then follow these steps or look at the screenshot below:
1. Click “Profile” in the top right corner -> Then click “detail” in the right side menu, below Profile.
2. Here you will see the following option: Shared with: Some friends (except limited access).
You can then change your privacy to “Me” forexample.
The hightligted text on the screenshot shows you where.