Dating can be a challenge. No, I'm not talking about the process of finding a soulmate. I'm talking about managing days, weeks, months, and years in statistical analyses and reports! One challenge is how to number the weeks of the year. Because there are seven days in a week, 52 weeks equals 7*52 = 364 days of the year. Of course, there are 365 (or 366) days in a year, so the "first week of the year" does not always start on New Year's Day. But when does it start? What date is the first day o...
