It's funny how, so far, series finales this year fall on the 15th day of the month. The last season of Carmen Sandiego came out January 15. The last episode of Big Hero 6 The Series was on February 15. The last episode of DuckTales comes out March 15. Book 4, the last book of Infinity Train , comes out April 15 (whether the final book comes out all at once or not, it still starts that day).