Here in Sweden, every calendar includes week numbers. You can enable viewing them in Outlook (I guess both ISO weeks and US style week numbering). Due to some s

Here in Sweden, every calendar includes week numbers. You can enable viewing them in Outlook (I guess both ISO weeks and US style week numbering). Due to some school holidays always falling on the same week (Winter holiday on week 9 in Stockholm, for example), they have impact outside workplaces. Schools of course find planning the year in weeks very convenient. This bleeds over into holiday planning at workplaces.