The word grieve comes from a process used in other jurisdictions and does not describe how Saskatoon's system works, so anyone searching for a grievance deadline is really looking for the Board of Revision's filing window, which is tied to your individual notice rather than a single citywide date.
What you are actually appealing is the assessed value the City of Saskatoon set at 80 percent of your property's value, using either a factual correction to the property record or comparable sold prices as evidence, filed with the fee the City requires before the deadline closes.
Check the date on your own 2026 notice rather than assuming a fixed calendar deadline applies citywide. Get your hand-reviewed valuation from Joel Dyck.