CCNote: I think there is some confusion among you all about the timeline of this story. In my mind I saw the dating as a fun nugget for readers to clue in on. Some of you got it but its confusing a lot of you. Sorry ya'll!
So here is a way to understand the headings:
Taka= Hawk/ Sasuke. Karasu= Crow/Itachi. Hato= Dove/ Hinata. (Eventually appearing) Suzume= Sparrow/Hanabi.
So for example: the Seventeenth Winter of the Taka means The Hawk's (Sasuke's) 17th winter. So whatever comes after that heading is happening while he is 17yrs old during the winter season.
I'm not breaking things down by month/ day because during this time calendars were not standardized across the board. The standardized Gregorian calendar that we use in the West started in 1582 and before that was the Julian Calendar. Through the machinations of the Catholic Church the calendar we know today has changed so much. Regarding edo era Japan, the calendar was controlled by the imperial court scholars and the shogunate. Months were marked by the waxing/waning of the moon and usually 29 or 30 days long. Also sometimes they added in an extra month called "Uru-zuki" to make the year 13 months long instead of 12. Years were marked by the sitting Emperor's reign.
In 1868 Japan adopted a one reign one era form of writing their years. We are currently in the Heisei era year 30 (Heisei 30). This era began the day Emperor Akihito took the throne in 1989 and will likely end unprecedently when he abdicates the throne to his son next year in April 2019 (Heisei 31). IDK what the new era will be called but it will surely be interesting.
ANYWAY! For an example of how dates are written: In America we write 08/21/2018. In Japan this date would be written 30/8/21. Yes, even today, on all of my important documents (pay stubs, bills, residence card, etc) I'm writing 30 instead of 2018 but the two are interchangeable on regular day to day stuff since Japan adopted the Gregorian calendar in 1872. You'll see a version of one or the other on t.v., written in books, or on posters and stuff.
As you can see calendars are complicated but regular smegular degular people marked the passing of time based on the seasons/harvest periods and how many times they'd experienced them. This is the simplest way to mark the passing of time but Sasuke's 17th Winter isn't as poetic as the Seventeenth Winter of the Taka. I'm also not writing out the Japanese names of the months for the edo calendar. That would just confuse everyone. So, I'm taking some creative license.
I don't claim to be an expert on calendars and their history by any means, but I hope this clears some things up! I'll be posting the real chapter of 'Love' either Sunday or Monday so keep your eyes peeled.
Until next time!