This guide is not 100% accurate as many events can be viewed on different dates. This worked for me so hopefully it will work for you as well.

MAJOR SPOILER ALERT!!! - some event details will contain spoiler so be warned.

Every instance of "? Month? Day Workshop ?" means that this event is linked to the request recieved earlier and it depends on when you craft the requested item.

Maybe like 20% of the guide was made from memory so there can be some inaccuracies of recipe names or side character names.

The guide may state that the event may be available on mornings but it can still be viewed on noon as well.

Another important note: some side events can be skipped if you decided to sleep instead of crafting/researching.

As for the endings, here are the spoiler free hints how to obtain each ending:
Normal ending:
P-type Orichalcum must be produced in December. Ultra-pure orichalcum must NOT be produced.
O-ending:
Reygurett must be in Tristia by the end of December & P-type orichalcum must NOT be produced.
D-ending:
P-type Orichalcum must be produced in December. Ultra-pure orichalcum must be produced ASAP.

STRUCTURE: Date and time of occurrence - Place - Time - Event details:

March 1st:
Workshop morning
Options

• Listen to Stuka's advice
  
• There's no need to ask☆

City Hall (Tristia Central) morning
Obtained a special certificate from the mayor's assistant
Temple (Tristia Central) morning
Scene with Reygurett
Fountain (Tristia Central) morning
Obtain 1B from the fountain in the Tristia Central (random, will occur many times after this). Try around 10-20 times for first unlock.
Dragon Memorial morning
An old man's story in front of the monument
Tristia Harbor morning
Carat Company people carrying cargo

March 2nd:
Workshop morning
Reygurett's job request. Obtain the recipe for the donation solicitation banner.

March 5th:
West Street noon
Obtain Maungo x3 from the Greengrocer lady.

March 8th:
Workshop morning
Faury visits. Rat Buster Production Request. Obtain Roach Mine Recipe and Monroe Effect

March 15th:
West Street morning
Reygurett 's Sigh
Options:

• You're secretly eavesdropping! ☆
  
• No, no, that's such a lame act...

This option will appear several times, but be sure to do all the eavesdropping.

March 20th:
Artisan Street morning
The old blacksmith leaves Tristia. Obtain 10 pieces of iron.

March 21st:
Tristia Harbor night
drunk Reygurett

March 28th:
Workshop night
Letter to Gramps

April 1st:
Forest Reserve noon
Obtain a dandelion (random, will occur many times after this)

April 2nd:
Workshop morning
Request from Faury to exterminate sharks. Obtain recipe for shark fishing gear set.

? Month? Day Workshop ?
After creating the shark fishing gear set, start shark fishing at the Tristia Harbor and Tenzan appears. Obtain shark fillet. Mobile fortress soldier Tenzan joins the party.

April 3rd:
Tristia Central noon
Obtain the recipe for the tourist information center construction blueprint
West Street noon
Scene with Faury

April 11th:
Workshop night
Visit of smuggler Mig. Obtain E-material x5.

April 14th:
Tristia Harbor noon
Mascot character creation request. Go to the Tristia Central and get Atrelia-chan's recipe.

? Month? Day Workshop ?
A story about the high-class restaurant after Nanoca creates Atrelia-chan.

April 15th:
Workshop morning
Letter from Nene

April 16th:
Seafront Boardwalk noon
Nanoca gets run over by a cart. Obtain 3 pieces of wood.
Dragon Memorial noon
The story of the dragon slayer hero.

April 17th:
Workshop morning
Request to make a new medicine from Reygurett. Obtain the recipe for NeyoNeyoSporin.

? Month? Day Workshop ?
After creating NeyoNeyoSporin, Val comes to visit while the product is being handed over.
Options:

• • Secretly eavesdropping! ☆
  
• • No, that's not a shameful imitation...

April 21st:
Workshop morning
Request for underwater hot spring foundation work from Val. Obtain recipe for watertight cream.

? Month? Day Workshop ?
After creating the watertight cream and completing the hot spring foundation work Nanoca will get permission to use the hot spring water without limit.

May 1st:
Workshop morning
Tenzan Flight Test. Underground Entrance Exploration
Tristia Central morning
Reygurett’s stew giveaway
Temple (Tristia Central) morning
Reygurett takes care of an injured child
Forest Reserve morning
Obtain soil (random, occurs many times after this).

May 2nd:
Workshop morning
Prehistoric civilization texts being deciphered.
Underground Entrance morning
Get Hiel Gas.

May 3rd:
Tristia Harbor morning
Obtain recipe for market blueprint.

May 5th:
Workshop morning
Nene appears.

May 7th:
Workshop morning
Request new menu creation. Get recipe for Hampden's Lunch.

? Month? Day Workshop ?
After creating Hampden's Lunch, encounter with Nene's Treasure

May 10th:
Seafront Boardwalk morning
Nene's Advice. Obtain Marine Tower blueprint & Environmental Development Research Book.
Workshop morning
Request to create a new ramen shop menu.

? Month? Day Workshop ?
Presentation to the mayor after completion of the Marine Tower blueprint.

? Month? Day Marine Tower ?
Obtain the recipe for the Marine Tower figurine after the construction of the Marine Tower.

May 11th:
Tristia Harbor noon
Event during Tristia Curry production request. Encounter with Happy Fish.
Options:

• Buy
  
• If you don't buy it, Faury will buy it.

West Street night
Attempted robbery case. Obtain superhero suit recipe.

May 12th:
Seafront Boardwalk morning
Obtain the recipe for the aquarium blueprint.

May 15th:
Workshop morning
Reygurett's Hybrid Rose production request. Obtain Rose x5

? Month? Day Temple (Tristia Central) night
After creating the hybrid rose, Reygurett and Val argue. Dinner with Reygurett at Hampden’s.

May 21st:
Tristia Harbor morning
Obtain the recipe for the cruise boat blueprint.

May 23rd:
Workshop morning
Griffen arrives.

May 24th:
Workshop morning
Pocket watch repair request from Griffen. Obtain recipe for Orichalcum Watch.

? Month? Day Workshop ?
Invitation from Griffen after creating Orichalcum Watch.

June 1st:
Workshop morning
Weapon production request from Q. Obtain Long Dragunov's recipe. Obtain E-material barrel.
South Street redevelopment begins.

June 3rd:
Tristia Central noon
Obtain recipe for public bath blueprint.

June 8th:
Workshop morning
Long Dragunov delivery.

June 10th:
Workshop morning
Get the recipe for grass-only salad.
Tristia Central morning
Faury came to mayor with a petition for the Gulf expansion project. A request to develop bow thruster.

June 11th:
Workshop morning
Breakfast at Hampden’s with Nene

June 15th:
Tristia Central morning
Reygurett's sermon. Eavesdrop option.

June 16th:
Workshop morning
Report of the discovery of Firewater. From now on, you can create items related to Firewater.

June 17th:
Workshop morning.
Request from the mayor to eliminate the mage
Options:

• Leave it to Stuka and obtain iron ingots, stones, herbs, gunpowder;
  
• I will try to do something on my own – only this choice will lead to mage giving oriental pottery on June 20th (night).

? Month? Day Workshop ?
After making the superhero suit, Tristia Man was born! Obtain the recipe for the Burglar Alarm.
If the date passes too much, you will not be able to obtain the recipe.

June 19th:
Workshop morning
Request to create a new menu for Gourmet. Obtain the recipe for Tristia curry.

? Month? Day Tristia Harbor morning
Production of Tristia curry. Kraken investigation/Tenzan dispatch. Obtain Kraken’s Ink.
If you helped Happy Fish, obtain Kraken’s Ink & 6000B.

? Month? Day Workshop ?
Rematch with Gourmet after making Tristia Curry.

June 28th:
Workshop morning
Date with Nene.
Condition - a marine tower has been built.

July 1st:
West Street noon
Let's all go to a pizza shop. Request to create a new menu for the pizza shop. Obtain Raimu Raijin Pizza x5.
Condition - there is a pizza shop in town.

July 1st:
Workshop night
Successfully deciphered ancient characters. Obtain Orichalcum Research Book I

? Month? Day Workshop ?
Obtain Orichalcum Research Book II after completing research on Orichalcum Research Book I

? Month? Day Workshop ?
After completing the Orichalcum Research Book II research, obtain the Book of Alchemy.

? Month? Day Workshop ?
After making the first artificial diamond, you may sell it to Mig and get 60000B.

? Month? Day Workshop ?
After completing the research on the Book of Alchemy, obtain the golden fragment. Sell the golden fragment to Mig and get 70000B.

July 3rd:
Workshop morning
Tenzan flight experiment part 2. Buzz discovery. After that, you can create Buzz related items.

July 4th:
Tristia Central morning
Obtain recipe for museum blueprint.

July 6th:
Workshop night
Faury and Lucy. Get Lucy Chocolate Recipe.

July 11th:
Seafront Boardwalk morning
Obtain the recipe for the beach blueprint.

? Month? Day Workshop ?
After producing the beach blueprint, present the plan to the mayor.

July 14th:
Workshop morning
Lucy's parents were found.

July 15th:
Workshop morning
Bargain Sale. Get 10 each of eggs, vegetables, meat bones, and fish bones.
Sleeping Rafarew

July 16th:
Workshop night
Rafarew’s awakening.

July 17th:
Workshop morning
Dessert production request. Get tropical Gelato recipe.

July 17th:
Forest Reserve noon
Prospero Flanka: The Man Production Request.

July 22nd:
Underground Entrance morning
Found soil at the entrance to the basement. Obtain the recipe for Buzz Kiln.
Condition - you must have a Buzz generator.

August 5th:
Workshop night
Lost in a snowy mountain with a cooler.
Condition - you must have a cooler.

August 7th:
Tristia Central morning
Obtain recipe for theater blueprint.

August 10th:
Workshop morning
Request to make Palanquin Orb fireworks.

August 15th:
Workshop night
Tristia Summer Festival held.
Seafront Boardwalk night
Tristia Recovery Plan. Obtain the recipe for the mermaid statue.

August 18th:
Workshop night
Stuka and Rafarew go somewhere. Advice on swimming from Nene.
Obtain the recipe for the Nanoca-style swimming textbook.

? Month? Day Workshop night
After creating the Nanoca-style swimming textbook, there will be Nene's special swimming lesson.

August 25th:
Tristia Central noon
Obtain recipe for library blueprint.

? Month? Day Workshop morning
After submitting the library blueprint to the city hall, there will be a scene with Reygruette and you will get a child book recipe.
? Month? Day Workshop ?
After making child book, you got feedback from Nene and Faury and get 6000B with the special jury award.

August 27th:
Workshop morning
The Workshop get attacked because Nanoca sold artificial diamonds to Mig.

? Month? Day Seafront Boardwalk morning or noon
Conversation between Stuka and Nene after the above attack event happened.

August 28th:
Workshop night
Fireworks display held

September 1st:
Workshop morning
Cran District redevelopment starts

September 2nd:
Workshop morning
Swimming with Faury and Nene.
Condition - watching the special swimming training event with Nene.

September 3rd:
South Street night
Rafarew comes out of the bar.
Seafront Boardwalk night
Obtain the hot plate recipe
Condition - buzz pack must be invented

September 4th:
Artisan Street morning
Obtain recipe for Still Mill blueprint

September 5th:
Workshop morning
Request from Q again. Obtain the recipe for updated Dragunov.
When the request is completed, you will receive the recipe for Dragunov Nanoca SP.

September 7th:
Workshop night
Rafarew looking up at the night sky

September 9th:
Workshop morning
A mysterious giant creature washed up in the harbor
Seafront Boardwalk morning
Nene and Faury sunbathing on the beach.

September 11th:
Underground Entrance morning
Obtain the recipe for rainbow-colored pottery

September 12th:
Cran District morning
Request for the Mermaid Statue for Hampden's

September 13th:
Cran District morning
Get recipe for natural color printing machine.

September 15th:
Tristia Harbor morning
Request from Faury: “restoring” a painting.

September 18th:
Workshop morning
September Fever Medicine Request
After this, go to the Tristia Harbor and get Haramandi Gizzards x10.

September 21st:
Tristia Harbor morning
Get recipe for canning machine

September 26th:
Workshop morning
Griffen's wine production request. Obtain recipe for Rapid Brewer

October 1st:
Workshop morning
Request for the construction of a bridge from the mayor. Obtain the recipe for the bridge blueprint
Submit the bridge blueprint to City Hall.
The next day, North Street will also be redeveloped.

October 2nd:
Workshop morning
Faury strongly opposes the construction of the bridge.
Tristia Harbor morning
Tristia Recovery Plan - obtain recipe for pressure ripening machine

October 5th:
South Street morning or noon
Royal H carpet production request from Nene

October 6th:
South Street night
Sailors talk about a mysterious gambler
Dragon Memorial night
Rafarew muttering in front of the monument

October 9th:
Workshop night
Trade festival held

October 12th:
Tristia Harbor morning
The story of the monster that the sailor saw

October 16th:
Workshop night
Last day of the trade festival, drinking alcohol and going wild

October 17th:
Workshop morning
Nanoca with a hangover

October 19th:
Workshop morning
Carat's crisis
Workshop night
Missing Faury
After searching the entire area, go to the Dragon Memorial.
The two look up at the night sky.
Obtain the recipe for the Harbor Expansion Plan.

October 22nd:
Workshop night
Reygurett's Dinner Invitation. Ryu Diffusion Production Request

October 23rd:
Workshop night
Swim with Rafarew
Condition - have a waterproof swimsuit.

October 25th:
Workshop morning
Request Buzz facility from the mayor. Obtain recipe for Buzz facility construction blueprint

October 28th:
Workshop night
Rafarew on the roof

November 1st:
West Street noon
Rumors of Alison's visit
Condition - A theater is being built.

? Month? Day Workshop night
After the above event occurs, Nene will request to make food for Alison.

? Month? Day Seafront Boardwalk morning
The day after the above event occurs, meet Alison and obtain the recipe for Tristian Stew.

November 2nd:
Cran District morning
Obtaining Snow Machine Recipe.
Condition - have a cooler

November 8th:
Dragon Memorial morning
After the success of Tristian Stew's event, Faury is reunited with her mother.
When returning home morning
Nene's request to make a celebratory cake. Obtain celebratory cake recipe and cake x1.
Workshop night
Let's all go to Public Bath.
Condition - Public Bath is being built.

November 12th:
Workshop night
Request from Rafarew. Obtain Rafarew’s flashlight recipe.

November 14th:
Workshop morning
Reygurett fell ill. Obtain the recipe for the energy supplement.

? Month? Day Workshop ?
After making the energy supplement, get the recipe for the fever medicine.

? Month? Day Workshop ?
Immediately after completing the production of the fever medicine, obtain the recipe for the Orq Light Radiator.

? Month? Day Workshop ?
After creating the Orq Light Radiator, Reygurett will keep Nanoca posted on the disease.

November 20th:
Workshop morning
A boy's request to see his father. Obtain the recipe for the Ferris wheel blueprint.

December 1st:
Workshop morning
On the day of the Ferris wheel trial run.

December 2nd:
Workshop morning
Depressed Nanoca
Movement Part
Be careful as you can only select once
Stuka & Tenzan's Persuasion
Artisan Street, West Street, Tristia Central, Cran District, South Street, North Street
Rafarew's Persuasion
Dragon Memorial, Underground Entrance, Marine Tower, Beach, Rainbow Bridge, Forest Reserve
Faury's Persuasion
Tristia Harbor, Seafront Boardwalk

December 5th:
Workshop morning
Reygurett's condition has rapidly worsened. Obtain the recipe for the micro treater.

? Month? Day Workshop ?
After making the micro treater. If all of Reygurett’s requests so far have been completed, Reygurett will survive.
If not, Reygurett will die.

December 11th:
Workshop morning
The true identity of the giant creature washed up in the ocean.

December 12th:
Workshop night
Rafarew looking up at the night sky

December 13th:
Workshop morning
Dragon attack. Intercept with Nanoca Dragunov SP.
Without Nanoca Dragunov SP, Rafarew will disappear.

December 14th:
Workshop night
Nanoca's Dream. Orichalcum Research Book III obtained.

December 16th:
South Street noon
Apologize again to the injured boy.

December 28th:
Workshop night
Nativity Festival
Condition - Reygurett must be recovering from illness and snow machine must be crafted and left in inventory.

January 2nd:
Workshop morning
Nanoca received a letter from her grandfather asking to return to the capital.

January 4th:
Workshop morning
Nene's secret maneuver and Nanoca's determination.

January 6th:
Workshop morning
Why the ship is not coming to Tristia.
Search for Nene.
If you built a marine tower & completed all of Nene's requests:
Obtain the broken alarm clock
Obtain the recipe for the friendship alarm clock
If you do not meet the above conditions
Nene will return to the imperial capital.

? Month? Day Workshop ?
After making a memorable alarm clock, search for Nene.
Search all areas to move forward.
Reconcile with Nene.

NORMAL ENDING ROUTE

January 20th:
Workshop morning
Griffen will be taken to the Imperial Capital.
P-type Orichalcum must be produced in December.

February 7th:
Workshop night
Rafarew goes on a journey of self-discovery.
Condition - Ultra-pure orichalcum must NOT be produced yet.

February 28th:
Workshop morning
normal ending

OCCUPATION ENDING ROUTE

January 19th:
Workshop morning
Request of nutritional supplement for plants from Reygurett. Obtain the recipe for Hyponex
Condition - Reygurett must be recovered from illness & P type orichalcum must NOT be produced.

? Month? Day Workshop ?
Conversation between Reygurett and Val after completing production of Hyponex
Eavesdropping options

January 21st:
Workshop morning
Rafarew goes on a journey of self-discovery.

January 25th:
Workshop morning
There are rumors that Tristia will be incorporated into the Empire's territory.

February 1st:
Workshop morning
Griffen gets ejected from Tristia.

February 18th:
Workshop morning
Present from Faury. Empire's Occupation Declaration of Tristia.

February 19th:
Workshop morning
Last night's public meeting.

February 21st:
Workshop morning
Reygurett’s request to Nanoca to leave Tristia
Travel to Rainbow Bridge to obtain the recipe for S-Impact HP.

? Month? Day Workshop morning
After S-Impact HP production.
Nanoca/Hand-to-hand combat
Move part
When you move to the Underground Entrance, the event progresses and you get the E Plant unit.

February 25th:
Workshop morning
Mysterious delivery arrived from the Imperial Capital.
Obtain natural high-purity orichalcum
Recipe for the Improved E-Plant Unit

? Month? Day Workshop ?
After E-plant unit is manufactured, Tristia starts.

? Month? Day Tristia Harbor ?
After starting Tristia, Nanoca is welcomed by the people of the town.

February 27th:
North Street morning
Soldier's gratitude: When my child is born, I will name him Nanoca.

February 28th:
Workshop morning
The day Nanoca leaves the city.
Occupation ending

DRAGON ENDING ROUTE

January 20th:
Workshop morning
Griffen will be taken to the Imperial Capital.
P-type Orichalcum must be produced in December.

February 1st:
Workshop night
Get the recipe from Orichalcum Research Book IV, where the idea of producing artificial ultra-high-purity orichalcum comes to Nanoca.

? Month? Day Workshop ?
After producing Orichalcum Research Book IV, obtain the recipe for artificial ultra-high purity orichalcum.

? Month? Workshop ?
Completed after producing artificial ultra-high purity orichalcum

February 15th:
Workshop night
Something approaching Tristia, who is in possession of artificial ultra-high purity orichalcum.

February 16th:
Workshop morning
Rafarew playing with the lights
Workshop night
Conversation with Rafarew and Tenzan

February 17th:
Workshop morning
Rafarew and Tenzan disappear

February 18th:
Workshop morning
Rafarew's true identity
Workshop night
A cry echoes through Tristia.

February 19th:
Tristia Central morning
Reygurett admonishing the residents
Tristia Harbor morning
Frightened Faury

February 20th:
Workshop morning
A cry that continues to echo

February 21st:
Workshop night
Visit of Mig. Obtain Mega Dragunov & military E-material steel plate.
Obtain Armored Tenzan recipe

? Month? Day Workshop ?
When Armored Tenzan is created, Rafarew is repaired.

February 24th:
Workshop night
The night before the decisive battle

February 25th:
Workshop morning
dragon attack

February 25th:
Tristia Central night
Words of the Town People. Conversation with Faury

February 26th:
Workshop night
Messenger from the empire.

February 27th:
Workshop night
The sound of tapping on the window

February 28th:
Workshop morning
dragon ending