No, not really. That is just icing on the cake. Working on international teams and having family in two countries has really done it for me.
With Time Zones:
"Ill call you at 7PM."
"Your time or my time?"
"My time."
"What time is that here... hold on let me check..."
"No worries, I already did. 8AM your time."
"Okay, thanks! That works!"
Without Time Zones:
"Ill call you at 7PM"
"It's a bit early, but should work"
You've heard of Greenwich Mean Time, right? You can use it.
