Ключевые слова: 2020, anniversary, annual, background, black, blackboard, board, calendar, celebration, chalkboard, cheerful, classroom, concepts, countdown, creativity, crossed, culture, drawing, education, entertainment, event, greeting, holiday, ideas, japan, learning, level, lifestyle, new, next, number, obsolete, old, oldfashioned, rough, season, shelf, sign, slate, space, surface, symbol, teaching, text, tokyo, traditional, wood, year,