This message occurs if one of the holidays sets selected in either of the aeiou-holidays or holidays override properties is a holidays set that is part of the sample worldwide holidays database.
➢You should not use holidays sets of the samples database, in any of your diaries.
You should always use holidays sets that you have created, either manually, or by copying holidays from the read-only sets to your own sets.
•Modify Holidays List Selection: opens the aeiou-holidays or holidays override property editors, depending on the origin of the message, so that you can select other holidays sets.
•Open the Holidays Manager: opens the holidays manager, so that you can create your own holidays sets, either manually, or by copying holidays from the read-only sets to your own sets.