What is the absolute latest an 11 year old girl should stay out for?

If an 11 year old girl is out with one friend, of the same age who is also a girl, what is the absolute latest they should be out until. If there are no adults with them, and they are just out playing and walking around the streets, etc. I mean at the, weekend, when there is no school the next day.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).