diff --git a/src/tests/calendar/Calendar.spec.ts b/src/tests/calendar/Calendar.spec.ts
index 9e6802317..e3da9d617 100644
--- a/src/tests/calendar/Calendar.spec.ts
+++ b/src/tests/calendar/Calendar.spec.ts
@@ -308,4 +308,247 @@ describe("Calendar", () => {
 		expect(calendar.querySelector("[data-selected]")).toHaveTextContent("21");
 		expect(calendar.querySelectorAll("[data-selected]").length).toBe(1);
 	});
+
+	it("should change view when controlled placeholder changes", async () => {
+		const { getByTestId, user } = setup({
+			placeholder: calendarDate
+		});
+
+		const heading = getByTestId("heading");
+		expect(heading).toHaveTextContent("January 1980");
+		const addMonthBtn = getByTestId("add-month");
+		await user.click(addMonthBtn);
+		expect(heading).toHaveTextContent("February 1980");
+		const addYearBtn = getByTestId("add-year");
+		await user.click(addYearBtn);
+		expect(heading).toHaveTextContent("February 1981");
+		await user.click(addMonthBtn);
+		await user.click(addMonthBtn);
+		await user.click(addMonthBtn);
+		expect(heading).toHaveTextContent("May 1981");
+	});
+
+	it("should not allow navigation before the `minValue` (prev button)", async () => {
+		const { getByTestId, user } = setup({
+			value: calendarDate,
+			minValue: new CalendarDate(1979, 11, 25)
+		});
+
+		const prevBtn = getByTestId("prev-button");
+		await user.click(prevBtn);
+		const heading = getByTestId("heading");
+		expect(heading).toHaveTextContent("December 1979");
+		expect(prevBtn).not.toHaveAttribute("aria-disabled", "true");
+		expect(prevBtn).not.toHaveAttribute("data-disabled");
+
+		await user.click(prevBtn);
+		expect(heading).toHaveTextContent("November 1979");
+		expect(prevBtn).toHaveAttribute("aria-disabled", "true");
+		expect(prevBtn).toHaveAttribute("data-disabled");
+
+		await user.click(prevBtn);
+		expect(heading).toHaveTextContent("November 1979");
+	});
+
+	it("should not allow navigation after the `maxValue` (next button)", async () => {
+		const { getByTestId, user } = setup({
+			value: calendarDate,
+			maxValue: new CalendarDate(1980, 3, 25)
+		});
+
+		const nextBtn = getByTestId("next-button");
+		await user.click(nextBtn);
+		const heading = getByTestId("heading");
+		expect(heading).toHaveTextContent("February 1980");
+		expect(nextBtn).not.toHaveAttribute("aria-disabled", "true");
+		expect(nextBtn).not.toHaveAttribute("data-disabled");
+
+		await user.click(nextBtn);
+		expect(heading).toHaveTextContent("March 1980");
+		expect(nextBtn).toHaveAttribute("aria-disabled", "true");
+		expect(nextBtn).toHaveAttribute("data-disabled");
+
+		await user.click(nextBtn);
+		expect(heading).toHaveTextContent("March 1980");
+	});
+
+	it("does not navigate after `maxValue` (with keyboard)", async () => {
+		const { getByTestId, user } = setup({
+			value: calendarDate,
+			maxValue: new CalendarDate(1980, 3, 31)
+		});
+
+		const firstDayInMonth = getByTestId("date-1-1");
+		firstDayInMonth.focus();
+		expect(firstDayInMonth).toHaveFocus();
+
+		const heading = getByTestId("heading");
+		expect(heading).toHaveTextContent("January 1980");
+
+		// five keypresses to February 1980
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-1-8")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-1-15")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-1-22")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-1-29")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-2-5")).toHaveFocus();
+		expect(heading).toHaveTextContent("February 1980");
+
+		// four keypresses to March 1980
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-2-12")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-2-19")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-2-26")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-3-4")).toHaveFocus();
+		expect(heading).toHaveTextContent("March 1980");
+
+		// four keypresses to April 1980
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-3-11")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-3-18")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-3-25")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_DOWN);
+		expect(getByTestId("date-3-25")).toHaveFocus();
+		expect(heading).toHaveTextContent("March 1980");
+	});
+
+	it("does not navigate before `minValue` (with keyboard)", async () => {
+		const { getByTestId, user } = setup({
+			value: calendarDate,
+			minValue: new CalendarDate(1979, 12, 1)
+		});
+
+		const firstDayInMonth = getByTestId("date-1-1");
+		firstDayInMonth.focus();
+		expect(firstDayInMonth).toHaveFocus();
+
+		const heading = getByTestId("heading");
+		expect(heading).toHaveTextContent("January 1980");
+
+		// one keypress to get to December 1979
+		await user.keyboard(kbd.ARROW_UP);
+		expect(getByTestId("date-12-25")).toHaveFocus();
+		expect(heading).toHaveTextContent("December 1979");
+
+		// four keypresses to November 1979
+		await user.keyboard(kbd.ARROW_UP);
+		expect(getByTestId("date-12-18")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_UP);
+		expect(getByTestId("date-12-11")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_UP);
+		expect(getByTestId("date-12-4")).toHaveFocus();
+		await user.keyboard(kbd.ARROW_UP);
+		expect(getByTestId("date-12-4")).toHaveFocus();
+		expect(heading).toHaveTextContent("December 1979");
+	});
+
+	it("handles unavailable dates appropriately", async () => {
+		const { getByTestId, user } = setup({
+			placeholder: calendarDate,
+			isDateUnavailable: (date) => {
+				return date.day === 3;
+			}
+		});
+
+		const thirdDayInMonth = getByTestId("date-1-3");
+		expect(thirdDayInMonth).toHaveTextContent("3");
+		expect(thirdDayInMonth).toHaveAttribute("data-unavailable");
+		expect(thirdDayInMonth).toHaveAttribute("aria-disabled", "true");
+		await user.click(thirdDayInMonth);
+		expect(thirdDayInMonth).not.toHaveAttribute("data-selected");
+	});
+
+	it("doesnt allow focus or interaction when `disabled` is `true`", async () => {
+		const { getByTestId, user } = setup({
+			placeholder: calendarDate,
+			disabled: true
+		});
+
+		const grid = getByTestId("grid-1");
+		expect(grid).toHaveAttribute("aria-disabled", "true");
+		expect(grid).toHaveAttribute("data-disabled");
+
+		const firstDayOfMonth = getByTestId("date-1-1");
+		expect(firstDayOfMonth).toHaveAttribute("aria-disabled", "true");
+		expect(firstDayOfMonth).toHaveAttribute("data-disabled");
+		await user.click(firstDayOfMonth);
+		expect(firstDayOfMonth).not.toHaveAttribute("data-selected");
+		firstDayOfMonth.focus();
+		expect(firstDayOfMonth).not.toHaveFocus();
+
+		const tenthDayOfMonth = getByTestId("date-1-10");
+		expect(tenthDayOfMonth).toHaveAttribute("aria-disabled", "true");
+		expect(tenthDayOfMonth).toHaveAttribute("data-disabled");
+		await user.click(tenthDayOfMonth);
+		expect(tenthDayOfMonth).not.toHaveAttribute("data-selected");
+		tenthDayOfMonth.focus();
+		expect(tenthDayOfMonth).not.toHaveFocus();
+	});
+
+	it("prevents selection but allows focus when `readonly` is `true`", async () => {
+		const { getByTestId, user } = setup({
+			placeholder: calendarDate,
+			readonly: true
+		});
+
+		const grid = getByTestId("grid-1");
+		expect(grid).toHaveAttribute("aria-readonly", "true");
+		expect(grid).toHaveAttribute("data-readonly");
+
+		const firstDayOfMonth = getByTestId("date-1-1");
+		await user.click(firstDayOfMonth);
+		expect(firstDayOfMonth).not.toHaveAttribute("data-selected");
+		firstDayOfMonth.focus();
+		expect(firstDayOfMonth).toHaveFocus();
+
+		const tenthDayOfMonth = getByTestId("date-1-10");
+		await user.click(tenthDayOfMonth);
+		expect(tenthDayOfMonth).not.toHaveAttribute("data-selected");
+		tenthDayOfMonth.focus();
+		expect(tenthDayOfMonth).toHaveFocus();
+	});
+
+	it("formats the weekday labels correctly - `'narrow'`", async () => {
+		const { getByTestId } = setup({
+			placeholder: calendarDate,
+			weekdayFormat: "narrow"
+		});
+		for (const [i, weekday] of narrowWeekdays.entries()) {
+			const weekdayEl = getByTestId(`weekday-1-${i}`);
+			expect(weekdayEl).toHaveTextContent(weekday);
+		}
+	});
+
+	it("formats the weekday labels correctly - `'short'`", async () => {
+		const { getByTestId } = setup({
+			placeholder: calendarDate,
+			weekdayFormat: "short"
+		});
+		for (const [i, weekday] of shortWeekdays.entries()) {
+			const weekdayEl = getByTestId(`weekday-1-${i}`);
+			expect(weekdayEl).toHaveTextContent(weekday);
+		}
+	});
+
+	it("formats the weekday labels correctly - `'long'`", async () => {
+		const { getByTestId } = setup({
+			placeholder: calendarDate,
+			weekdayFormat: "long"
+		});
+		for (const [i, weekday] of longWeekdays.entries()) {
+			const weekdayEl = getByTestId(`weekday-1-${i}`);
+			expect(weekdayEl).toHaveTextContent(weekday);
+		}
+	});
 });
+
+describe.todo("Calendar - `multiple`");
diff --git a/src/tests/calendar/CalendarTest.svelte b/src/tests/calendar/CalendarTest.svelte
index a1c513c9c..1d79b83a8 100644
--- a/src/tests/calendar/CalendarTest.svelte
+++ b/src/tests/calendar/CalendarTest.svelte
@@ -9,6 +9,8 @@
 	function changeValue(field: "day" | "month" | "year") {
 		if (value) {
 			value = value.cycle(field, 1);
+		} else if (placeholder) {
+			placeholder = placeholder.cycle(field, 1);
 		}
 	}
 </script>
@@ -44,7 +46,7 @@
 					<Calendar.GridHead data-testid="grid-head-{m}">
 						<Calendar.GridRow data-testid="grid-row-{m}">
 							{#each weekdays as day, i}
-								<Calendar.HeadCell data-testid="head-cell-{i}">
+								<Calendar.HeadCell data-testid="weekday-{m}-{i}">
 									{day}
 								</Calendar.HeadCell>
 							{/each}