For those of you collecting data for the Maine Bird Atlas, I've made an app where you can check whether today's date falls within the safe dates for a given species.
So, if you see or hear a bird and want to know in the field whether it is all right to submit as Possible (H) or Possible(S), just go to
https://christinemurr.shinyapps.io/CheckDates/ on your phone, type in the species name, and it will tell you whether it is "safe" to submit a breeding code.
-Christine