Ключевые слова: april, august, business, calendar, consumers, contract, date, days, december, diary, february, flatrate, for remuneration, icon, illustration, important, isolated, january, july, june, kalendarium, kalenderblatt, march, may, meeting, month, monthly, note, november, number, october, office, organizer, performance, plan, reference, regularly, schedule, schedule system, september, sign, subscription, symbol, time schedule, todo, years,