year and split year displaying incorrectly

currently, the weeks 1-15 which should be displayed as split years are displayed as singular years and weeks 16-52/3 which should be displayed as singular years are displayed as split years: 

<img width="2498" height="1639" alt="Image" src="https://github.com/user-attachments/assets/6c16e4e9-51b3-4703-acc6-fb74a0a953b9" />