Ключевые слова: 1, 1st, 1st may, april, arranged, background, begin, beginning, business, calendar, concept, conceptual, copyspace, daily, dairy, date, day, education, end, future, happy, happy may, hello, hello may, job, labor, labor day, labour, labour day, march, may, monday, month, monthly, office, organizer, reminder, schedule, school, season, space, spring, start, symbol, text, time, word, work, worker, year,