timeline based on given dates from the series.
Yuri starts to "shape" under her father's hands.
Yuri meets Momoka.
Momoka changes Yuri's fate and makes Yuri's Father disappear.
1995 March 20
Momoka dies (10); Tabuki (10).
Ringo and Shoma are born.
1999 March 19
1999 March 20
Ringo's Birthday. Ringo (4).
Tokyo Sky Metro subway system is put into effect.
Shoma and Kamba "starve as they are trapped in caged boxes".
2005 March 20
Ringo's Birthday; Curry Day. Ringo (10); Tabuki (16-17).
Ringo speaks with Tabuki about Momoka.
2006 March 20
Ringo's Birthday; Curry Day. Ringo (11); Tabuki (17-18).
2007 May 5
Hibari, Hikari, and Himari apply to 16 Magazine's idol competition and are rejected. Himari (9).
Hibari, Hikari, and Himari form " Triple H".
Chiemi is permanently scarred when trying to protect Himari.
Himari, Hibari, and Hikari catch the school koi fish.
Police investigate the Takakura Residence and Kenzan's and Chiemi's involvement in the subway incident. Kamba (13); Shoma (13); Himari (9-10).
Himari stops going to school.
2011 July 24
Himari watches Double H on Music JAPoooooN.
Dr. Washizuka tells Kamba and Shoma, Himari's death is inevitable. Himari (13).
The Takakura siblings go to the Aquarium. Kamba (16); Shoma (16); Himari (13); Ringo (16).
Himari dies then is revived thanks to the Penguin Hat.
2011 October 15 (Sat)*
The package of penguins arrive. Shoma goes to school.
Himari first fully transforms into the Princess of the Crystal.
2011 October 19 (Fri)*
Kamba and Shoma follow Ringo around for the day.
2011 October 20 (Thu)*
Ringo meets Yuri for the first time. And meets Himari shortly after.
2011 October 22
Tabuki, Yuri, Ringo, and Shoma go birdwatching.
The "Heart-Broken Victims of Takakura Kamba Assocation" confront Kamba at a resteraunt.
Asami is pushed down the stairs at Akasaka-mitsuke station.
Typhoon hits Tokyo.
Ringo meets the Princess of the Crystal for the first time. Then agrily throws the penguin hat away. Kanba recovers it.
Shoma helps Ringo move her things to under Tabuki's apartment.
2011 November 1
"The Tragedy of M" opens as HSK.
Tabuki and Ringo see the "The Tragedy of M".
2011 November 6
Tabuki and Yuri announce thier engagement at a party where she tells the press she'll be retiring from acting.
2011 November 11
Ringo performs the frog ceremony with Shoma's help.
Ringo decides to forcefully put "Project M" into action by sneaking into Tabuki's room. But Tabuki stays the night with Yuri.
Tabuki fully moves in with Yuri.
A typhoon moves in over Tokyo.
Ringo and Shoma visit Tabuki at his new apartment. Ringo drugs Tabuki and Shoma, then attempts to rape Tabuki.
The end half of the Diary is torn away by a stranger riding a motorbike.
Shoving Ringo out of the way, Shoma is hit by a car.
Shoma wakes up at To'oh Hospital and is shortly abducted by Masako Natsume.
Masako coerces Ringo to give the front half of the Diary in exchange of the twins' safety.
2011 November 17 (Wed)*
2011 November 27
"The Tragedy of M" has a final show at HSK.
Unknown Month/Year Edit
???? 20 (Tue)*
Yuri proposes to Tabuki.
*Please Note: Although the days of the week are included according to screenshots, they are never accurate. Case in point: October 15 and 19 are four days apart, but are marked as Saturday and Friday respectively, which is six days apart. As well as when Ringo turned ten, Tabuki should've been 19-20, but they say he was 16-17.