You always know roughly where you are in the day. Morning has a feel. The light, the coffee, the slow engine of the mind turning over. Afternoon has a different weight. Evening has another one. Even without a clock you...
Most of modern life is organized around circadian time—the day—while ignoring an equally real biological scale: the circannual rhythm—the year. Circannular wasn't even in my spellcheck dictionary! It's probably not in yours either...