What information is present in the header section with days of the week?

The header section displays days of the week in Russian: 'Среда' (Wednesday), 'Вторник' (Tuesday), and 'Понедельник' (Monday). Beneath each day are numbers, possibly indicating dates or a sequence within a weekly schedule. For example, under 'Понедельник', there are numbers 1 through 8, and under 'Вторник', numbers 1 through 5. This implies a structured timetable or plan.