Yeah sorry Trigs just getting to this now. I am showing the same thing if you can also confirm if you go to December 2023 then got to Jan 2024 it actually goes to Jan 2023 even though the URL says
https://pokerforum.ca/calendar/2024/01
Just want to confirm this is the same issue you were seeing? It seems like if you put any year in the future than the current year in the URL it reverts back to this year.