during summer vacation
Во время летних каникул я работал на почте.
During the summer holidays I worked at the post office.
Во время летних каникул я работал в ресторане.
During my summer vacation, I worked at a restaurant.
Я посетил Хоккайдо во время летних каникул.
I visited Hokkaido during my summer holidays.
Во время летних каникул я работаю на почте.
During the summer holidays I work at the post office.