In the SAP R/3 family of products, there is also a component Factory Calendar (IMG -> SAP NetWeaver -> General Settings -> Maintain Calendar, transaction /SCAL) - a component that knows about all the various calendar systems incl. public holidays of the world and the dreaded leap years. If I remember correctly, it's customizable for each customer premise with respect to whether each day of the year is salaried or not.
This is a component classified as "basis technology" relied upon by many modules for billing (e.g. should a daily salaray be calculated in a country for a particular person? Should an invoice be considered "overdue" yet, based on the number of business days passed since issue? etc.).
This is a component classified as "basis technology" relied upon by many modules for billing (e.g. should a daily salaray be calculated in a country for a particular person? Should an invoice be considered "overdue" yet, based on the number of business days passed since issue? etc.).