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<html><body><form action="/action_page.php"> Enter a date before 1980-01-01: <input type="date" name="bday" max="1979-12-31"><br> Enter a date after 2000-01-01: <input type="date" name="bday" min="2000-01-02"><br> <input type="submit" value="Send"> </form></body></html>