It would benefit us to be informed where Linden Lab places the default "North" in their default scene. We could all guess that a default scene has a direction to it based on the idea that forward is North. Then from there, turning 90 degrees to the right would make us face East. But there seems to be an error in the Skybox template that makes us unsure of where Linden Lab has placed the four cardinal direction.
Yes, in Office Hours, Jason said that we as creators can place North anywhere we want it to be. But if we knew for sure that we can agree with Linden Lab that the default North was the +Y axis, the discussion that follows about the error in the Official Skybox template would become a coherent conversation.