Multi-year seasons/office terms/numerical ranges are acceptable as long as the duration/range size remains constant, and no years/numbers are randomly skipped. The length of each duration/range is automatically determined from the originating category name, up to and including 10 years. MOS:DATERANGE compliance is preferred, but some deviation is allowed and tracked. {{Category redirect}}s are followed, if necessary, and tracked. The gap size between successive durations/ranges is also automatically determined, up to and including 5 years if a surrounding category is found, and defaults to 0 (e.g. 1995–96 → 1996–97).
Condensed year display is supported for presidential categories only (at the moment), for gaps up to and including 5 years, and defaults to 1.
Ordinal words do not work above the ninety-ninth; no higher working examples found.
General: for large, permanent gaps between successive categories, or when the base category name changes, use {{Category pair}} in addition to {{Navseasoncats}} on both sides of the gap/name change. Even if {{Navseasoncats}} is isolated, it has the benefit of confirming the absence of nearby categories to the reader/maintainer.
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