As charters we know how important it is to be able to view charts quickly at any time!
Very long menstrual cycle charts, for example those relating to pregnancy / postpartum / PCOS, can occasionally take a while to load in the app depending on phone model and system memory.
By default the chart view is therefore set to be split into segments every 90 days (with cycle day numbering continuing uninterrupted across these segments) to ensure fast chart loading.
If you prefer to have an uninterrupted chart view or splits on certain days, you can manage these settings at Menu > Settings > Display options > Split long charts.