Ключевые слова: 29, 2017, 2018, 2019, 2020, 29th, abstract, appointment, background, birthday, blank, blue, business, calendar, concept, conceptual, corporate, cubes, daily, date, day, december, diary, empty space, event, idea, important, message, month, monthly, new year, ninth, nobody, note, notice, number, organize, organizer, remember, remind, reminder, sign, symbol, time, tomorrow, twenty, white, winter, wood, wooden,