Very nice, thanks! A few questions though:
1) What's with 19.07.2020? Why this specific date?
2) What's the meaning of each color? I couldn't figure out the classification here, sorry. '^^
3) Why are the ages for Tsubasa, Chinami and Tsukasa arrays (like ##[#])? This was fixed, it seems?
4) I couldn't find any official info on some of these ages. How much here is speculation?
July 19, 2020 is the assumed start date of the game. Ami's birthday event, Couple's Discount, happens 43 days into the game (if the other prereqs are met)
The only ages directly stated in game I believe are, Imani, Kaori, Wakana, Osako, Niki, Akira, Sara, Haruka, Maki, Yuki and Rika. Granted Rin has said her mom is 43 so chance that is wrong. Some of those might be inferred; Sara, Haruka, Maki went to school together, and I know Sara's age was mentioned (i cant recall if Haruka or Maki was officially stated). Wakana and Osako are the same age, and Wakana's age is directly mentioned. The others I listed have directly say how old they are ( aside for Akira who needed Niki to tell him)
And we know for sure Rin was skipped ahead a grade and is younger than most of the class, and Chika missed a year so is older than most.