Ключевые слова: 2020, background, business, calendar, concept, coronavirus, covid19, daily, danger, date, day, day off, desk calendar, diary, disease, epidemic, event, health, health care, infection, lay, mark, mask, medical, medical mask, meeting, month, number, organization, outbreak, pandemic, pin, plan, planner, planning, protection, quarantine, red, reminder, safety, schedule, self protection, space, table, text, time, vacation, virus, work,