Ключевые слова: accuracy, background, balance, clock, color, concept, countdown, counting, deadline, duration, efficiency, eternity, expire, finish, flowing, glass, hour, hourglass, life, light, management, measure, measuring, minute, object, passing, past, patience, planning, process, punctual, room, run, running, sand, sandclock, sandglass, schedule, second, start, table, target, task, time, timer, wait, wasting, window,