Ключевые слова: 6, 6 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, sixth day december, start, symbol, time, week, white, winter, wooden, work, workplace,