The change has been slow, yet unrelenting. Since the Winter Solstice, the sun’s setting has daily delayed, if even by one minute, so that journeys and chores once completed in darkness now are accompanied by brilliant twilight. Yet, even as this change in evening’s day length has been progressing, mornings remain as dark and foreboding as they had a month before. Morning journeys and chores are still completed in darkness. The morning darkness has been unrelenting and slow to change. But as January ends the mornings too will brighten. With increasing rapidity the sunrise will advance, first by five minutes...