A couple years back, I tried to figure out which month birthed the most Newbery Medals.

Now it’s time for Caldecott.

Similar to my Newbery assumption, I figured the most Caldecott medals would come from the pumpkin-spiced months. Adding to this is the fact that if you look at previous Caldecott winners with books out this year, many have been hitting shelves this fall (Henkes, Stead, Selznick, to name a few).

So I compiled the publication dates for the last 20 years of medal winners and here’s how things shook out:

September is the most common publication month for Caldecott Medal winners in the last 20 years. Also worth noting is that while August-September is the three-month stretch containing the most medals, the first half and second half of the year are equal (ten each). February, June, July, November, and December are all Caldecott black holes for the last 20 years.

Anything jump out to you?

Showing my work time. Here were the publication dates of the last 20 Caldecott Medal winners as best as I could track them down. If you disagree with a date, let me know.

2015: The Adventures of Beekle: April 8, 2014

2014: Locomotive: September 3, 2013

2013: This Is Not My Hat: October 9, 2012

2012: A Ball for Daisy: May 10, 2011

2011: A Sick Day for Amos McGee: May 25, 2010

2010: The Lion & the Mouse: September 1, 2009

2009:  The House in the Night: May 5, 2008

2008: The Invention of Hugo Cabret: January 30, 2007

2007: Flotsam: September 4, 2006

2006: The Hello, Goodbye Window: April 26, 2005

2005: Kitten’s First Full Moon: March 2, 2004

2004: The Man Who Walked Between the Towers: Sepember 5, 2003

2003: My Friend Rabbit: May 1, 2002

2002: The Three Pigs: April 23, 2001

2001: So You Want to Be President?“: August 21, 2000

2000: Joseph Had a Little Overcoat: October 1, 1999

1999: Snowflake Bentley: September 28, 1998

1998: Rapunzel: October 1, 1997

1997: Golem: January 28, 1996

1996: Officer Buckle and Gloria: September 28, 1995