More than just time. So much more.
While simply computing the difference in hours can perpetually confuse one, knowing that the people you love are on the other side of the country, or even on the other side of the world, wherever they are, is the hardest part.
I assume that I never realized the trouble with time zones until my parents. Yes, my parents. The utter adults I am supposed to hate with all my guts as a typical teenager, I can honestly say I love with all my heart. Constantly traveling for business, I not only wish I was with them strolling through the streets of New York City or practicing my broken Chinese in the heart of Shanghai, but most of the time, I just wish I could call them whenever I wanted to.