Can other options be added to the calendar beyond contract start and due date?
Not currently — the calendar is limited to contract start and due date at this time.
What can I do in the meantime?
The recommended workaround is to use tags on parcels to further customize how you organize and label things outside of the current calendar options. This helps keep your pipeline structured while the feature is still being developed.
A Few Things to Know
A feature request has already been submitted for expanded calendar options, and the team is actively working to build that in. If this is important to your workflow, let your account manager know — customer feedback directly shapes what gets prioritized in the product.