It's not easy to make calculation with time in Excel, especially if you want to do calculation for tenths, hundredths and thousandths.In this article, you will have all the explanations to do such calculation.
This article present how can create an automatic calendar in excel to avoid and refresh manually your worksheet, step by step. Tutorial video available.
In Excel the way to return the week number is based on the American system. But most of countries use the ISO system. What is the technique to avoid mistakes.