in Drupal 7 I have a View with two contextual filters (date field):
When YEAR is the first argument and if there is none I make a Summary of the view, so the result can be something like:
* 2017 * 2016 * 2015
And MONTH is the second parameter, that if it's not present, the view also makes a Summary:
* January * February * ...
I think that I'm stuck replicating the same View in Drupal 8, because the first Summary has a default parameter "all" wich is the exception of the second parameter.
Also if there is a better way to built that kind of view (like better performance) I'll apreciate the advice.