The steps to cancel the birthday in the Kuwo Music nickname editing information are as follows:

1. Open the Kuwo Music software, log in to your account, and on the main page, click on the character avatar in the upper left corner.

2. In the pop-up menu list, select the "Personal Homepage" option. After entering the Kuwo Music personal homepage, select the "Edit" option in the upper right corner.

3. In the personal information editing interface, find the "Birthday" column, delete the original birthday information, or choose not to fill it in. After the modification is completed, click the "Save" button.