Year One: April
Year One: May
Year One: June
Year One: July
Year One: August
Year One: September
Year One: October
Year One: November
Year One: December
Year One: January
Year One: February
February 16th → Sanada turns 16.
Year One: March
(Hotori is in accident, is hospitalized.)
→ Recieves the rejection notice from Mystery Illustrated mid-April.
Takeru is in Grade 4, Class 3.
Yukiko is in Grade 2, Class 1.
Year Two: April
(Hotori released from hospital.)
Year Two: May
Year Two: June
June 16th → Myna bird escapes.
June 20th → Myna bird discovered by Kon.
Year Two: July
These chapters occur on the same day:
Year Two: August
Volume 4, Chapter 29 "Arashiyama Treasure Hunters" (嵐山財宝調査隊)
Volume 10, Chapter 74 "Diary About a Sister" (アネの日記)
Volume 5, Chapter 39 "Novel Between Dream and Reality" (夢現小説)
Volume 6, Chapter 49 "Kon-Senpai's Silent Rage" (紺先輩の静かな怒り)
Volume 3, Color Extra "The Beach House Tearjerker" (海の家号泣事件)
Volume 6, Chapter 50 "Phantom Boy" (まぼろしの少年)
Volume 8, Chapter 63 "Kappa Quest" (KAPPA QUEST)
Volume 10, Chapter 75 "Futaba Dead End" (フタバ・デッドエンド) → Kameidou leaves for Africa.
Year Two: September
Volume 3, Chapter 20 "Pandora's Box" (パンドラの箱)
Volume 12, Chapter 96 "Ghost Painting" (幽霊絵画) (Autumn segment.) → Masked Liger Kohada begins airing.
Volume 7, Chapter 52 "Autumn Festival" (秋まつり) → September 22nd
Volume 5, Chapter 41 "Stormy Night" (大嵐の夜に) → The laundry pole in the Arashiyama household's gardens snaps, Kon-senpai loses her ring.
Volume 11, Chapter 88 "Miracle Super Lucky Ring" (ミラクルスーパーラッキー指輪)
Year Two: October
Volume 3, Chapter 21 "Labyrinth Orchestra" (迷路楽団) (First half.) → October 1st
Volume 4, Chapter 31 "A Bowl of Machine Soba" (一ぱいのミシンそば)
Volume 9, Chapter 70 "Impulse Buying like a Boss" (大人買い計画)
Volume 3, Chapter 27 "One or Eight Again" (ワン・オア・エイト・アゲイン)
Volume 10, Chapter 77 "Nest" (巣) (Prelude.) → School festival program is published, the band begins practicing.
Guidebook Extra Chapter "Tatsuno Toshiko Band" (辰野俊子バンド)
Volume 10, Chapter 77 "Nest" (巣) (Main segment.)
Volume 3, Chapter 21 "Labyrinth Orchestra" (迷路楽団) (Second half.) → School festival is on October 30th
Year Two: November
Volume 4, Chapter 32 "Battle! Fairy vs. Reaper" (激突! 妖精VS死神)
Volume 3, Chapter 24 "Detective Girls" (Detective girls)
Volume 15, Chapter 119 "Poor Boys & Bad Girls Ensemble Theater" (不猟少年不良少女群像劇) → Dog poster is put up.
Volume 7, Chapter 55 "Time Waits for No One" (時は待ってくれない)
Volume 4, Chapter 33 "Very Weak Card" (実に微妙なカード)
Year Two: December
Volume 3, Chapter 25 "Cursed Roulette" (呪いのルーレット)
Volume 7, Chapter 54 "Disappointing Card" (ガッカリなカード)
→ Foster parents are found for the dog.
Volume 6, Chapter 46 "Time Capsule" (タイムカプセル)
Volume 11, Chapter 89 "The Adventure of the Speckled Band, Modern Version" (現代版まだらの紐)
Volume 10, Chapter 78 "Detective Girls 2" (Detective girls 2)
Volume 7, Chapter 56 "Territory" (テリトリー)
Year Two: January
Volume 4, Chapter 34 "A Dumb Way to Spend New Year's" (まぬけな正月の過ごし方) → After the first of the year Ramen Parade raises its prices.
Volume 9, Chapter 66 "Burn, Hotori" (燃えよ歩鳥)
Volume 12, Chapter 94 "A-ko-ga-re Longing" (A・KO・GA・REロンギング)
Volume 10, Chapter 79 "Hotori's War" (歩鳥の戦争)
Volume 6, Chapter 45 "Two Who Cannot Meet" (逢えない二人)
Volume 7, Chapter 58 "Bloody Valentine" (血のバレンタイン)
Year Two: February
Volume 10, Chapter 80 "Mysterious Disk" (謎の円盤)
Volume 7, Chapter 57 "Soremachi Suspense Theater II" (それ町サスペンス劇場②) → Ski trip.
Volume 12, Chapter 92 "Night Stalker" (ナイトストーカー)
Volume 6, Chapter 44 "Tell It Like It Is" (ざっくばらん) → Hotori's hair gets cut short.
Year Two: March
Uncollected Chapter "Time Bomb" (時限爆弾) → Middle school class reunion.
Volume 12, Chapter 93 "Hotori Solves a Mystery at a Kotatsu" (歩鳥はコタツで推理する)
Volume 15, Chapter 121 "Migrating Bird" (立つ鳥) (Intro segment.) → Kon-senpai gets into her second choice university.
Volume 14, Chapter 113 "Red" (赤)
Volume 9, Chapter 67 "Return Jealous Look" (答砲悋気)
Volume 15, Chapter 120 "Tatsuno Toshiko's Friend" (辰野俊子のお友達) → Ryochin VS Tatsuno
→ Kon-senpai graduates in mid-March.
Volume 15, Chapter 121 "Migrating Bird" (立つ鳥) (Spring break segment.) → Kon-senpai moves out of Kawai apartments.
Takeru is in Grade 5, Class 3.
Yukiko is in Grade 3, Class 1.
Year Three: April
Volume 13, Chapter 103 "Gone into the Darkness" (闇の中の消失)
Volume 6, Chapter 48 "Hotori's First Time" (歩鳥初体験)
Volume 14, Chapter 110 "With Big Sister" (お姉さんといっしょ) → Yukiko begins kendo.
Volume 8, Chapter 59 "Smile Away" (笑ってごらん) (Kotatsu is put away.)
Volume 8, Chapter 61 "The Great Beast Appears at Oya High School" (大怪獣 尾谷校に現わる) → Fukuzawa's face is injured.
Year Three: May
Volume 10, Chapter 81 "Hotori's First Kiss" (歩鳥ファーストキス)
Volume 16, Chapter 122 "Dream of the Future" (未来の夢)
→ Conbini holds a Golden Week fair.
Volume 15, Chapter 114 "School Trip" (修学旅行) → School Trip (Hotori purchases carved wooden bears as souvenirs.)
Volume 9, Chapter 72 "The Ghost of Ri-Chan the Liar" (嘘つきリッちゃんの亡霊)
Year Three: June
Volume 12, Chapter 98 "Epilogue" (エピローグ)
Volume 12, Chapter 95 "Yukiko's Swordsmanship" (ユキコの剣)
Volume 13, Chapter 105 "Cursed Video" (呪いのビデオ)
Volume 16, Chapter 123 "Detective Girls Final" (Detective girls final) → Kon-senpai travels to England for about a week, leaving on June 5th.
Volume 16, Chapter 124 "Huge Case" (大事件) → Hotori solves the mystery of "Sluguchi" and confronts her. Hotori decides that issues between men and women are beyond her.
Year Three: July
Volume 15, Chapter 117 "False" (虚) → Ryochin's home and older brother first appear.
Volume 16, Chapter 125 "Kon-Senpai Special" (紺先輩 スペシャル) (Beginning segment.)
Volume 16, Chapter 125 "Kon-Senpai Special" (紺先輩 スペシャル)
Volume 16, Chapter 127 "The Blessed Café (Forever)" (至福の店 フォーエバー) → Tatsun quits her part-time job at Seaside in July. As a result, Seaside returns to being a regular cafe rather than a maid cafe.
Year Three: August
Volume 9, Chapter 73 "Moriaki in the Night Sky" (森秋 夜空に散る)
→ Hotori buys a new alarm clock.
Volume 16, Chapter 126 "Evil" (悪)
Volume 15, Chapter 118 "Botan Doro" (牡丹灯籠)
Year Three: September
Volume 10, Chapter 76 "Arashiyama Family Housework" (嵐山家 家事担う)
September 8th → Typhoon XX
Volume 13, Chapter 99 "Stake Out" (張り込み)
Volume 16, Chapter 129 "Girl A" (少女A) (Final chapter.) → Hotori is working on her play script for the school festival.
Year Three: October
Volume 14, Chapter 108 "Novel Between Dream and Reality - Continued" (続・夢現小説) → At this point in time Kameidou has heard Ryochin's name but never met her face-to-face.
→ "Girl A" is performed at the school festival.
Year Three: November
Volume 14, Chapter 109 "Doppelganger" (ドッペルゲンガー)
Volume 8, Chapter 65 "Farewell, Noodles" (さよなら麺類)
Year Three: December
Volume 14, Chapter 111 "Fantasy Novel" (夢幻小説) (Beginning and ending segments.)
Year Three: January
Year Three: February
Year Three: March
→ Hotori graduates.
The following isn't information from the SoreMachi Official Guidebook, it's just my own digging from putting this together.
WebMaster: Yuri Pig