Ключевые слова: 21, annual, annual leave, appointment, business, businessman, calendar, concept, date, day, design, event, final, happy, holding, holiday, holidays, important, joy, leave, marker, may, meeting, memory, message, month, motivation, notebook, number, office, organizer, paper, pen, plan, planner, red, responsibility, save the date, spring, start, sticky, text, time, timetable, travel, vacation, week, weekday, writing, year,