First time poster. I'm going nuts trying to figure out the timer system on my Zojirushi rice cooker. I've had it for 8 years, and now wanting to use the timer. I've watched the vids on YouTube, and googled instructions. I still can't don't get it. There's no a.m. or p.m. ... with the timer, are you setting a specific time or number of hours? And if it's time, why does it go up to 20:00-plus. It's not military time. Any suggestions would be greatly appreciated.