diff --git a/bulma-ui/src/form/DateInputBase.tsx b/bulma-ui/src/form/DateInputBase.tsx
index a00cdfcc3..592627c6b 100644
--- a/bulma-ui/src/form/DateInputBase.tsx
+++ b/bulma-ui/src/form/DateInputBase.tsx
@@ -332,14 +332,18 @@ export const DateInputBase = forwardRef<HTMLInputElement, DateInputBaseProps>(
     const containerClass = usePrefixedClassNames('dateinput-container');
     const triggerClass = usePrefixedClassNames('dateinput-trigger');
 
+    // What the latest request asked for, so a second request in the same
+    // event sees it before React renders. The callbacks fire here rather than
+    // in a state updater, which StrictMode calls twice, and after the state
+    // is set, so a request a callback makes is the one that lands last.
+    const requestedOpenRef = useRef(false);
     const setOpen = useCallback(
       (next: boolean) => {
-        setOpenState(prev => {
-          if (prev === next) return prev;
-          if (next) onOpen?.();
-          else onClose?.();
-          return next;
-        });
+        if (requestedOpenRef.current === next) return;
+        requestedOpenRef.current = next;
+        setOpenState(next);
+        if (next) onOpen?.();
+        else onClose?.();
       },
       [onOpen, onClose]
     );
diff --git a/bulma-ui/src/form/DateTimeInputBase.tsx b/bulma-ui/src/form/DateTimeInputBase.tsx
index 6c69104b5..444ddf697 100644
--- a/bulma-ui/src/form/DateTimeInputBase.tsx
+++ b/bulma-ui/src/form/DateTimeInputBase.tsx
@@ -363,18 +363,22 @@ export const DateTimeInputBase = forwardRef<
     'datetimeinput-footer-time-pill'
   );
 
+  // What the latest request asked for, so a second request in the same event
+  // sees it before React renders. The callbacks fire here rather than in a
+  // state updater, which StrictMode calls twice, and after the state is set,
+  // so a request a callback makes is the one that lands last.
+  const requestedOpenRef = useRef(false);
   const setOpen = useCallback(
     (next: boolean) => {
-      setOpenState(prev => {
-        if (prev === next) return prev;
-        if (next) {
-          valueAtOpenRef.current = value;
-          onOpen?.();
-        } else {
-          onClose?.();
-        }
-        return next;
-      });
+      if (requestedOpenRef.current === next) return;
+      requestedOpenRef.current = next;
+      setOpenState(next);
+      if (next) {
+        valueAtOpenRef.current = value;
+        onOpen?.();
+      } else {
+        onClose?.();
+      }
     },
     [onOpen, onClose, value]
   );
diff --git a/bulma-ui/src/form/TimeInputBase.tsx b/bulma-ui/src/form/TimeInputBase.tsx
index 0d030a8ba..e49e7b3a2 100644
--- a/bulma-ui/src/form/TimeInputBase.tsx
+++ b/bulma-ui/src/form/TimeInputBase.tsx
@@ -304,18 +304,22 @@ export const TimeInputBase = forwardRef<HTMLInputElement, TimeInputBaseProps>(
       'timeinput-footer-done'
     );
 
+    // What the latest request asked for, so a second request in the same
+    // event sees it before React renders. The callbacks fire here rather than
+    // in a state updater, which StrictMode calls twice, and after the state
+    // is set, so a request a callback makes is the one that lands last.
+    const requestedOpenRef = useRef(false);
     const setOpen = useCallback(
       (next: boolean) => {
-        setOpenState(prev => {
-          if (prev === next) return prev;
-          if (next) {
-            valueAtOpenRef.current = value;
-            onOpen?.();
-          } else {
-            onClose?.();
-          }
-          return next;
-        });
+        if (requestedOpenRef.current === next) return;
+        requestedOpenRef.current = next;
+        setOpenState(next);
+        if (next) {
+          valueAtOpenRef.current = value;
+          onOpen?.();
+        } else {
+          onClose?.();
+        }
       },
       [onOpen, onClose, value]
     );
diff --git a/bulma-ui/src/form/__tests__/DateInput.test.tsx b/bulma-ui/src/form/__tests__/DateInput.test.tsx
index cdc159205..9a00dba06 100644
--- a/bulma-ui/src/form/__tests__/DateInput.test.tsx
+++ b/bulma-ui/src/form/__tests__/DateInput.test.tsx
@@ -1989,3 +1989,78 @@ describe('DateInput focus handed back on close', () => {
     });
   });
 });
+
+describe('DateInput onOpen and onClose', () => {
+  const june15 = new Date(2024, 5, 15);
+  const pressEscape = (on: Element) =>
+    act(() => {
+      fireEvent.keyDown(on, { key: 'Escape' });
+    });
+
+  it('fire once per open and close under StrictMode', () => {
+    const onOpen = jest.fn();
+    const onClose = jest.fn();
+    const { getByRole, queryByRole } = render(
+      <React.StrictMode>
+        <DateInput defaultValue={june15} onOpen={onOpen} onClose={onClose} />
+      </React.StrictMode>
+    );
+    act(() => {
+      getByRole('combobox').focus();
+    });
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(document.activeElement!);
+    expect(queryByRole('dialog')).toBeNull();
+    expect(onOpen).toHaveBeenCalledTimes(1);
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+
+  it('still opens after an onClose that focuses the input', () => {
+    // Under openOnFocus that focus asks to open from inside onClose, before
+    // the close has rendered, and the later request wins.
+    const Picker = () => {
+      const inputRef = React.useRef<HTMLInputElement>(null);
+      const refocusedRef = React.useRef(false);
+      return (
+        <DateInput
+          ref={inputRef}
+          defaultValue={june15}
+          onClose={() => {
+            if (refocusedRef.current) return;
+            refocusedRef.current = true;
+            inputRef.current?.focus();
+          }}
+        />
+      );
+    };
+    const { getByRole, queryByRole } = render(<Picker />);
+    const input = getByRole('combobox');
+    act(() => {
+      input.focus();
+    });
+    pressEscape(document.activeElement!);
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(document.activeElement!);
+    expect(queryByRole('dialog')).toBeNull();
+    fireEvent.click(input);
+    expect(getByRole('dialog')).toBeInTheDocument();
+  });
+
+  it('fires onClose once when the input and the popover both take Escape', () => {
+    const onClose = jest.fn();
+    const { getByRole, queryByRole } = render(
+      <DateInput defaultValue={june15} onClose={onClose} openOnFocus={false} />
+    );
+    const input = getByRole('combobox');
+    act(() => {
+      fireEvent.click(getByRole('button', { name: 'Choose date' }));
+    });
+    act(() => {
+      input.focus();
+    });
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(input);
+    expect(queryByRole('dialog')).toBeNull();
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/bulma-ui/src/form/__tests__/DateTimeInput.test.tsx b/bulma-ui/src/form/__tests__/DateTimeInput.test.tsx
index a89a5e4bf..251c91e92 100644
--- a/bulma-ui/src/form/__tests__/DateTimeInput.test.tsx
+++ b/bulma-ui/src/form/__tests__/DateTimeInput.test.tsx
@@ -1397,3 +1397,78 @@ describe('DateTimeInput focus handed back on close', () => {
     });
   });
 });
+
+describe('DateTimeInput onOpen and onClose', () => {
+  const v = new Date(2024, 5, 15, 9, 30);
+  const pressEscape = (on: Element) =>
+    act(() => {
+      fireEvent.keyDown(on, { key: 'Escape' });
+    });
+
+  it('fire once per open and close under StrictMode', () => {
+    const onOpen = jest.fn();
+    const onClose = jest.fn();
+    const { getByRole, queryByRole } = render(
+      <React.StrictMode>
+        <DateTimeInput defaultValue={v} onOpen={onOpen} onClose={onClose} />
+      </React.StrictMode>
+    );
+    act(() => {
+      getByRole('combobox').focus();
+    });
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(document.activeElement!);
+    expect(queryByRole('dialog')).toBeNull();
+    expect(onOpen).toHaveBeenCalledTimes(1);
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+
+  it('still opens after an onClose that focuses the input', () => {
+    // Under openOnFocus that focus asks to open from inside onClose, before
+    // the close has rendered, and the later request wins.
+    const Picker = () => {
+      const inputRef = React.useRef<HTMLInputElement>(null);
+      const refocusedRef = React.useRef(false);
+      return (
+        <DateTimeInput
+          ref={inputRef}
+          defaultValue={v}
+          onClose={() => {
+            if (refocusedRef.current) return;
+            refocusedRef.current = true;
+            inputRef.current?.focus();
+          }}
+        />
+      );
+    };
+    const { getByRole, queryByRole } = render(<Picker />);
+    const input = getByRole('combobox');
+    act(() => {
+      input.focus();
+    });
+    pressEscape(document.activeElement!);
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(document.activeElement!);
+    expect(queryByRole('dialog')).toBeNull();
+    fireEvent.click(input);
+    expect(getByRole('dialog')).toBeInTheDocument();
+  });
+
+  it('fires onClose once when the input and the popover both take Escape', () => {
+    const onClose = jest.fn();
+    const { getByRole, queryByRole } = render(
+      <DateTimeInput defaultValue={v} onClose={onClose} openOnFocus={false} />
+    );
+    const input = getByRole('combobox');
+    act(() => {
+      fireEvent.click(getByRole('button', { name: 'Choose date and time' }));
+    });
+    act(() => {
+      input.focus();
+    });
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(input);
+    expect(queryByRole('dialog')).toBeNull();
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/bulma-ui/src/form/__tests__/TimeInput.test.tsx b/bulma-ui/src/form/__tests__/TimeInput.test.tsx
index 673343cd2..98299de72 100644
--- a/bulma-ui/src/form/__tests__/TimeInput.test.tsx
+++ b/bulma-ui/src/form/__tests__/TimeInput.test.tsx
@@ -1715,3 +1715,81 @@ describe('TimeInput focus handed back on close', () => {
     });
   });
 });
+
+describe('TimeInput onOpen and onClose', () => {
+  const pressEscape = (on: Element) =>
+    act(() => {
+      fireEvent.keyDown(on, { key: 'Escape' });
+    });
+
+  it('fire once per open and close under StrictMode', () => {
+    const onOpen = jest.fn();
+    const onClose = jest.fn();
+    const { getByRole, queryByRole } = render(
+      <React.StrictMode>
+        <TimeInput defaultValue={at(9, 30)} onOpen={onOpen} onClose={onClose} />
+      </React.StrictMode>
+    );
+    act(() => {
+      getByRole('combobox').focus();
+    });
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(document.activeElement!);
+    expect(queryByRole('dialog')).toBeNull();
+    expect(onOpen).toHaveBeenCalledTimes(1);
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+
+  it('still opens after an onClose that focuses the input', () => {
+    // Under openOnFocus that focus asks to open from inside onClose, before
+    // the close has rendered, and the later request wins.
+    const Picker = () => {
+      const inputRef = React.useRef<HTMLInputElement>(null);
+      const refocusedRef = React.useRef(false);
+      return (
+        <TimeInput
+          ref={inputRef}
+          defaultValue={at(9, 30)}
+          onClose={() => {
+            if (refocusedRef.current) return;
+            refocusedRef.current = true;
+            inputRef.current?.focus();
+          }}
+        />
+      );
+    };
+    const { getByRole, queryByRole } = render(<Picker />);
+    const input = getByRole('combobox');
+    act(() => {
+      input.focus();
+    });
+    pressEscape(document.activeElement!);
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(document.activeElement!);
+    expect(queryByRole('dialog')).toBeNull();
+    fireEvent.click(input);
+    expect(getByRole('dialog')).toBeInTheDocument();
+  });
+
+  it('fires onClose once when the input and the popover both take Escape', () => {
+    const onClose = jest.fn();
+    const { getByRole, queryByRole } = render(
+      <TimeInput
+        defaultValue={at(9, 30)}
+        onClose={onClose}
+        openOnFocus={false}
+      />
+    );
+    const input = getByRole('combobox');
+    act(() => {
+      fireEvent.click(getByRole('button', { name: 'Choose time' }));
+    });
+    act(() => {
+      input.focus();
+    });
+    expect(getByRole('dialog')).toBeInTheDocument();
+    pressEscape(input);
+    expect(queryByRole('dialog')).toBeNull();
+    expect(onClose).toHaveBeenCalledTimes(1);
+  });
+});