Ключевые слова: 21, 21st, appointment, background, blank, business, calendar, concept, daily, date, day, deadline, design, diary, euro, event, first, football, golf, grass, green, idea, important, jul, july, lawn, meadow, meeting, memory, message, month, monthly, number, object, one, organize, organizer, plank, planner, remember, remind, reminder, sign, soccer, summer, symbol, time, today, twenty, week,