Here are 10 quick things to know about Tokyo's Summer Olympics.Number One. Tokyo hosting the Summer Games for the second time is 13 hours ahead of the Eastern time zone.U.S. fans may end up watching some events on tape-delay.Number Two. The Games will take place at 42 venues around Japan.Race walking and the marathon were moved to 500 miles away in Sapporo to avoid the Tokyo heat.Number Three. It might be 2021 but these are the 2020 Olympics.The pandemic delayed the Games, but Olympic organizers kept the Tokyo 2020 name because the Olympics always fall in even-number years.Number Four. A slow vaccination campaign and the rise of the delta variant forced officials to ban spectators from most events.In a recently released survey of Japanese citizens, 83% of respondents stated they did not want the Olympics to go on as planned.Already, at least 60 Olympic athletes and staff have tested positive for Covid-19.Number Five. While there will be hardly any fans athletes from 204 countries will be attending.The largest Olympic Nation? China. The smallest? The island nation of Nauru, with a population just over 10,000.Russian athletes will be competing but not officially representing Russia.Russia's flag, anthem and team name were banned from the competition following the 2015 discovery of the country's extensive doping program.And twenty-nine athletes who have had to flee their own countries will compete as the Refugee Olympic Team.