Ключевые слова: 1, 1st, agenda, april, background, business, calendar, celebration, concept, date, day, deadline, event, finance, first, fool, fools, fun, funny, green, hand, happy, holiday, humor, isolated, joke, joy, laughter, laughter day, month, monthly, note, number, office, one, organizer, paper, plan, prank, red, registration, reminder, schedule, sign, symbol, text, time, traditional, week, white,