The second of December 1928 (Sunday!) was indeed an important date. Wikipedia tells us:
“Prince Henry, Duke of Gloucester joined his brother Edward in abandoning an African trip to rush to the bedside of the ailing King.[4]
The Frank Lloyd-directed sound film Adoration starring Billie Dove was released.”

For the curious as to what happened next, on the 3rd:
“The physicians of George V issued an early morning bulletin stating that oxygen had been administered to the King during the night.[5]
The Firestone Hour, a classical music program, was first broadcast on the NBC Radio network.”