While "7" may be obvious in the context of calendaring that it represents the number of week days, it often gives me the impression of it being a magic number when I'm hyperfocused on certain parts of the codebase for several consecutive hours. Turning the number into a macro helps me scan functions much more easily. Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/674>