http://www.wordnik.com/lists/night-and-day.xml day length, daily cycle, and so on because the <a href="/words/summer solstice">summer solstice</a> is coming http://www.wordnik.com http://www.wordnik.com/words/circadian rhythm Mon, 18 Jun 2007 16:58:40 +0000 http://www.wordnik.com/words/circadian rhythm http://www.wordnik.com/words/circadian Mon, 18 Jun 2007 16:57:42 +0000 http://www.wordnik.com/words/circadian http://www.wordnik.com/words/nocturnal Mon, 18 Jun 2007 16:57:15 +0000 http://www.wordnik.com/words/nocturnal http://www.wordnik.com/words/diurnal Mon, 18 Jun 2007 16:55:54 +0000 http://www.wordnik.com/words/diurnal http://www.wordnik.com/words/winter solstice Mon, 18 Jun 2007 16:55:38 +0000 http://www.wordnik.com/words/winter solstice http://www.wordnik.com/words/summer solstice Mon, 18 Jun 2007 16:55:25 +0000 http://www.wordnik.com/words/summer solstice http://www.wordnik.com/words/solstice Mon, 18 Jun 2007 16:55:12 +0000 http://www.wordnik.com/words/solstice