Mark a special holiday as “Rare” day to enable the model to collect days outside the reference period window of data. This special setting can help providing more model data for uncommon holidays when e.g. having similar days to use in another part of the year. Or to be able to hold reference period short and in the same time use data from other Eastern holidays.
The setting in daytype must also be accompanied by the “Fetch rare days” setting in the forecast series model
