Onetime is a slick app that lets you track multiple time zones as easily as tracing a finger through the sky.
It was the middle of the night, and John Edson's brain was frazzled with jet lag. He couldn't get back to sleep. The president of international design firm Lunar lives in San Francisco, but this was his fifth trip to Beijing in just a few months, and his circadian rhythm was all out of whack. "I woke up in the middle of the night, did some complicated mental math, and decided it was around 2 in the morning," Edson remembers. Plenty of time to get some shut-eye. So Edson popped a melatonin, shut his eyes, and just as he was drifting off, got a call on his hotel phone. "Mr. Edson. It's time for you to wake up."