In what month was Harrison taken by the H-G men?

Harrison Bergeron is the fourteen-year-old son of George and Hazel Bergeron. They are citizens of the United States in 2081, a time when the Constitution has been amended to require equality for all citizens. Despite the society's efforts to make life perfect, however, the government had not been able to change the coming of spring, and April was still cooler than people wanted it to be. Besides being disappointed about the weather, George and Hazel have another reason to dislike April. That was the month that agents from the office of the United States Handicapper General had come to their home to arrest their son, Harrison. Harrison had been plotting to overthrow the government, it was suspected. George and Hazel cope with the loss of their son by not thinking about him much.