I believe the answer is: cancer
According to research, about 60% of people who developed cancer got in when they hit the age of 60 or above.
The destruction of cells that happen in older people's body happen on a much higher rate compared to younger people but the regeneration is much slower. This plays a role in speeding up the growth of cancer.
Answer:
he declared a bank holiday
The time is 5pm if it is 3pm