We have a Sylvania 30" Timer Wreath that has 3 options... On/Off; Blank Button; and Timer. How do I set the Timer option?

Is it the battery one or corded? Battery is usually preset to a fixed time, typically 6 hours. So, if you move it to timer, it will stay on for six hours. Normally you would switch it on when you want and 6 hours later it turns off.