Configure a book calendar with week-based periods /visma-net-erp/help/fixed-assets/books-and-book-calendars/configure-a-book-calendar-with-week-based-periods section You add a book calendar for each non-posting book you add to the system by using the Book calendars (FA206000) window. 2026-02-19T17:09:06+01:00 # Configure a book calendar with week-based periods You add a book calendar for each non-posting book you add to the system by using the Book calendars (FA206000) window. For more information: [Book calendars (FA206000)](/visma-net-erp/help/fixed-assets/fixed-asset-windows/book-calendars-fa206000/). You add a book calendar for each non-posting book you add to the system by using the [Book calendars (FA206000)](/visma-net-erp/help/fixed-assets/fixed-asset-windows/book-calendars-fa206000/) window. For each calendar, you have to define the parameters of the financial year, including its starting and ending dates and its periods. 1. Go to the [Book calendars (FA206000)](/visma-net-erp/help/fixed-assets/fixed-asset-windows/book-calendars-fa206000/) window. 1. In the **Book** field, select the book for which you want to set up a book calendar. 1. Set up the first year of the book calendar: 1. In the **Year starts on** field, select the date for the start of the book calendar year. 1. If the start date of the book year belongs to the next financial year, select the **Belongs to next year** check box. The system then determines the first calendar year. 1. To define periods, in the **Period type** field, select **Week**. 1. In the **Periods start day of week** field, select the day of week on which periods will start. 1. Select the **Add adjustment period** check box if you want the system to generate an adjustment period. 1. Click ![icon-save](/media/visma-net-erp/icon-save.png).

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