Ключевые слова: 17, 17 december, agenda, appointment, birthday, block, business, calendar, celebrate, celebration, concept, conceptual, cube, date, day, deadline, december, december calendar, education, elearning, event, freelance, holiday, international, job, labor, lifestyle, month, monthly, notice, number, office, organizer, plan, planner, planning, reminder, schedule, season, seventeenth day december, start, symbol, time, week, white, winter, wooden, work, workplace,