Why am I being asked for my date of birth when signing into Skype?

We require a date of birth for all Microsoft accounts to promote child safety in accordance with applicable laws and to provide you with the best user experience. Additionally, depending on your region, a parent or guardian's permission may be required to create an account.

For more information, please visit our site Parental consent and Microsoft child accounts. You can also manage your Microsoft account from your account profile page.