The General's Physical

The general went to the doctor for a physical. Before he began, the doctor asked him the standard questions -- age, height, weight, and then he asked when was the last time the general had sex.
'Oh,' he mused, 'It was 1945.'
'Isn't that a long time to go without sex?' the doctor asked.
'I don't think so. According to your clock it's only 21:13.'