Noticed this when looking at this project
https://www.inaturalist.org/projects/the-alexander-mackay-students-nature-project-the-phenology-of-nova-scotia?tab=about which says “Only months January to June are included in this project - corresponding to period in the MacKay study.” But that’s not listed in the project filters.
I tried it out by limiting a collection project to obs from the month of January:
https://www.inaturalist.org/projects/big-ol-test-project?tab=about
Nothing displays here about it only showing January observations.