What date does Isle Royale use?

April 3, 1940 — Wikipedia’s Date established as park. Month and day assign the card; the year is unused.

What is Isle Royale's National Park birth card?

The 5 of Spades. That is a coordinate on the Card Blueprints calendar, not a fortune-telling claim about the park.

Where do the dates come from?

Primary: Wikipedia List of national parks of the United States, Date established as park. Footnotes: NPS Park Anniversaries. NPS Park Anniversaries lists Isle Royale National Park (authorized) (1931-03-03) as an earlier first-unit record. That date is cited, not mapped.

National Park coordinate

Isle Royale's National Park Birth Card: The 5 of Spades

Date established as National Park: April 3, 1940

Calendar coordinate only — month and day map to this card. Year is unused. Not a fortune-telling reading.

How the card is assigned

Isle Royale National Park (Michigan) became a National Park on April 3, 1940. Card Blueprints uses April 3 — month and day only — and the public D1 birth-card rule (December 31 is the Joker). The year 1940 is unused.

Coordinate: the 5 of Spades. Live card page (Next.js origin): /birth-card/5-of-spades.

Parks that share April 3

No other current National Park shares this month and day on the Wikipedia list.

Other parks on the 5 of Spades

Wind Cave — 5 of Spades
Channel Islands — 5 of Spades

Isle Royale on the record

Isle Royale National Park is a national park of the United States consisting of Isle Royale, along with more than 400 small adjacent islands and the surrounding waters of Lake Superior, in Michigan. Isle Royale is 45 mi (72 km) long and 9 mi (14 km) wide, with an area of 206.73 sq mi (535.4 km2), making it the fifth-largest lake island in the world. In addition, it is the largest natural island in Lake Superior, the second-largest island in the Great Lakes (after Manitoulin Island), the third-largest in the contiguous United States (after Long Island and Padre Island), and the 33rd-largest island in the United States. Isle Royale National Park was established on April 3, 1940. It later received additional protections from development by a wilderness area designation in 1976, a UNESCO International Biosphere Reserve declaration in 1980, and was added to the National Register of Historic Places in 2019 as the Minong Traditional Cultural Property. The park covers 894 sq mi (2,320 km2), with 209 sq mi (540 km2) of land and 685 sq mi (1,770 km2) of surrounding waters. The park's northern boundary lies adjacent to the Canadian Lake Superior National Marine Conservation Area along the international border. With 25,894 visits in 2021, it is the seventh least-visited National Park in the United States.

Summarised from the lead section of the Wikipedia article Isle Royale National Park (CC BY-SA 4.0). Nothing here was written for this page beyond that article. National Park establishment dates come from the Wikipedia list column and NPS Park Anniversaries, not from this article.

FAQ

What date does Isle Royale use?: April 3, 1940 — Wikipedia’s Date established as park. Month and day assign the card; the year is unused.
What is Isle Royale's National Park birth card?: The 5 of Spades. That is a coordinate on the Card Blueprints calendar, not a fortune-telling claim about the park.
Where do the dates come from?: Primary: Wikipedia List of national parks of the United States, Date established as park. Footnotes: NPS Park Anniversaries. NPS Park Anniversaries lists Isle Royale National Park (authorized) (1931-03-03) as an earlier first-unit record. That date is cited, not mapped.

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The $9 Deep Dive is a written report for a birthday you enter — not a reading of Isle Royale National Park.

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Sources: Wikipedia CC BY-SA 4.0 (List of national parks of the United States, column “Date established as park”, retrieved 2026-09-06; article Isle Royale National Park) + NPS Park Anniversaries footnotes (nps.gov, retrieved 2026-09-06). Dates are not invented.