Ключевые слова: 2021, agenda, annual, appointment, background, business, calendar, calender, concept, daily, date, day, deadline, design, desk, diary, event, flat, holiday, important, job, marker, meeting, memo, memory, month, monthly, note, notice, number, office, organization, organize, organizer, page, paper, plan, planner, planning, remind, reminder, schedule, time, travel, vacation, week, work, year,