You may love holiday lights — But there's a good reason why some people don't, experts say The lack of a year zero means the first A.D. decade started at year 1 and ran until the end of year 10 ...

I have been stunned at the level of debate in social media about whether 2020 is the start of a new decade or the end of the last decade. I am sure this happens every 10 years, but I am noticing ...