Relationship between midnight line and international date line

[likewhoa]

What will be the relationship between the midnight line and the international date line when the entire world has the same day?

Can I get some hints I'm stomped.

 

[skeptic2]

Tell us what you're thinking. What do you know about the International Date Line?

 

[likewhoa]

The international date line changes the days when you cross over it I believe.