Retail

The retail calendar, from the National Retail Federation, is modeled to analyze week-over-week data across years. It has a 4-5-4 quarter pattern with leap weeks every five to six years. The starting date differs from year to year but always falls in early February. When comparing year over year, standard practice is to omit the first week of a 53-week year to normalize for the extra week while the years keep the same holidays. Available time depths are year, semester, quarter, month, week, and day.