Week numbers with Microsoft Excel
For analyzing and visualizing data on a timeline we are often consolidating the data on a monthly basis. Especially for monitoring and reporting, however, you need a higher level of detail, i.e. you will have to analyze and visualize your data by weeks.
Unlike the months of the year, the definition of a week is not fully standardized. There are different approaches of how to calculate the numbers of the weeks. The results of the data analysis and the according visualizations depend on the week numbering method you are using.
This post describes 3 different methods of numbering weeks and shows their impact on the resulting data visualization.