Weekyear weeks start on Mondays if I understood the ISO date information correctly, and it sounds like the example start date in the question was a Sunday (the last day of the previous week, in weekyear thinking). Could you add one day to the date before comparing weekyears to counter that? Wait no, that is buggy if this.file.day is the Sunday that begins the week - any idea how to fix?
Thanks for that @Craig, it works like a charm.
Is there a list of all of the “Implicit Fields” options?
I know this list but it only shows file.blah not all the options that can come after, such as file.day.weekyear or file.day.week.
These date-related fields are documented on a different page of the documentation! These apply to anything that dataview believes is a date or date+time, including fields you write (explicit fields?) that are dates.