An infected tick must be attached for 24 to 48 hours to transmit Lyme disease (and at least 12 to 24 hours to transmit anaplasmosis, another serious tick-borne disease). Lyme disease is unfortunately a fairly common canine disease. Symptoms can include fever, reduced energy, and lameness.
D-day(n.) (Mil.) the day designated for the beginning of a planned attack by a military force; in communications the day is often otherwise unspecified for security reasons; as, the day before D-day the troops will move into position.
Many people think they know the answer: designated day, decision day, doomsday, or even death day. Our answer, like many answers in the field of history, is not so simple. Disagreements between military historians and etymologists about the meaning of D-Day abound. Here are just two explanations: