How to add custom holidays to the calendar

To add custom holidays to Outlook calendar, do the following:

   1.   Open the outlook.hol file (after first making a safe copy of it somewhere else):

For example, it can be here: C:\Program Files (x86)\Microsoft Office\root\Office16\1033\outlook.hol.

   2.   Go to the end of the file, and add events using the following format:

• [Description of Section] nnn - useful description of the section, and then type the name of the events; the nnn part represents the number of events within the section
• Event or holiday description, yyyy/mm/dd
• Event or holiday description, yyyy/mm/dd

   3.   On the File tab, click the Options button:

   4.   In the Outlook Options dialog box, on the Calendar tab, under Calendar options, click the Add Holidays... button:

   5.   In the Add Holidays to Calendar dialog box, select the country and check holidays for it:

   6.   Click Ok to add holidays of the selected "country" to your Outlook calendar:

See also How to delete holidays and events from the calendar.

See also this tip in French: Comment ajouter les fêtes et des jours fériés personnalisées du calendrier.