> When you're dealing with someone internationally, you know not to call them at midnight their time because there's a high probability they may be sleeping. I

> When you're dealing with someone internationally, you know not to call them at midnight their time because there's a high probability they may be sleeping. If we all used the same time though, instead of looking up what their time is now, you'd change to looking up what their time is when they'll be sleeping. Doesn't seem a huge difference but not saying either is better for that.