There is a need to import exchange rates only once a month and it has to be the last working day of the month. ECB updates the file with that date. For example 31st of October 2021 was Sunday and the rate file was dated 29th of October. When trying to import the rates last day of the month, no file was found. There are several months in a year, where the last working day is not the actual last day of the month and without possibility to select last working day as a criteria, a continuous batch job is not possible to crate.
I do believe this criteria could be useful for other types of batch jobs as well.