The Weekdays recurrence options lets you specify if there are there any special cases depending on the weekday on which the holiday occurs. When a holiday rule leads to a date that is a specific weekday, you can choose to have the occurrence moved, duplicated or deleted.
For example, most Japanese holidays, if they fall on a Sunday, are moved to the next Monday. Use this option for such cases. These options, along with the use of conflict rules, are also useful for the calculation of days in lieu for Christmas and Boxing Day in the UK.
Important: the present Weekdays part of a recurrence rule is processed before the Offset options.
See also: Holiday Names Variations.