I was testing the new comparing feature inside the calendar and I found this.

1. select period = day (for example 5 nov 2018)
2. check ✔️ «Compare in» then select «Previous year»

I expected a compared dashobard of 2018-11-05 day period and 2017-11-05 day period but query is ran with 2016-11-05 CompareDates[] and ComparePeriods[] = range.

Then I've expected I can compare day periods and not custom ranges.
This means to me Matomo is always calculating a range report. Not using pre-archived periods.

Note: «Compare to: previous period» works like expected