Beginning and ending dates are roughly the reverse in the southern hemisphere. For example, mainland Chile observed DST from the second Saturday in October to the second Saturday in March, with transitions at 24:00 local time. The time difference between the United Kingdom and mainland Chile could therefore be five hours during the Northern <answer>summer</answer>, three hours during the Southern <answer>summer</answer> and four hours a few weeks per year because of mismatch of changing dates.
During what season in the Southern hemisphere is there a three-hour time difference between mainland Chile and the United Kingdom?
summer