Ключевые слова: 1, agenda, anniversary, april, birthday, business, calendar, celebrate, celebration, concept, daily, date, day, deadline, destination, education, empty, event, first, fix, fool, holiday, important, labour, marked, message, month, monthly, next, number, office, one, organizer, prank, remember, reminder, renovation, schedule, school, season, sign, start, symbol, text, time, today, week, word, work, year,