Rereading Chapters 372 onwards, after Chapter 405 release. In retrospect and checking with other chapters, here's some details and speculation of dates. (Caveat: still haven't finished rereading through all the chapters before 405, but let's get this out before 408...)

Dates :

It's possibly Sunday 21 May 2028, when Kim Soleum woke up in the Off-Duty Zone of Namhae Branch.

• According to Z993's diary, the workers think they started work on 5 May.
• The Namhae Branch workers were 16 days into the 30 days period. (84 days remaining of 100)
• So the date then should be 21 May.
• The Off-Duty Zone is open on weekends, and Soleum started work the next day, so it was likely a Sunday, so 21 May 2028 is the most likely date.
• Of course, this could be inaccurate, due to the recycling process...

I'm still working on compiling a timeline by date, so I could well disprove my own assertions lol... (I'm still stumped at the employee orientation date, since five-ish days after that, D-Squad started saying it's the end of the month, instead of early July...)

Other Details :

Z993's Diary

• Z993's diary has an entry dated 5/35472, and now that we know that workers are recycled every 30 days, that number doesn't look so implausible now...
• Still is unlikely, because that'd make it ~98 years of employment, but, well.
• Also, Z993 had been initially in X group, maybe Soleum will meet them again...

The wooden doll, Qterw-C-348

• Soleum might have only delayed the wooden doll's retaliation, with the rice and alcohol offering poured over its burial mound, since he didn't restore its talisman, and only partially performed the Sumang-gut ritual for drowned victims.

• ....it might come up again after 405... Argh. He isn't allowed to clear it permanently either, because Daydream wants it harvestable still.

• Four Pillars / Saju 사주 / Birth Chart relevance in the [I'll Let You Go Now] Qterw-C-2554 darkness that Soleum refers to, for clearing this.

• Specifically, that a person was able to escape the wooden doll / water ghost, by becoming a monk, because the element of water wasn't in their Four Pillars.

• In Part 1 Chapter 201, the Four Pillars concept was also relevant for Daecheongbong Tiger General, as the ghost story could be used to absorb misfortune or bad luck, if the utiliser's Four Pillars and profession contains the aspect of bloodshed, blades, or punishment.

• Choi, in that scenario. And he used it to destroy Ho Yuwon's bindings on himself, then Soleum. (Then he put Soleum in the Glass Prison uhhh)

• Not sure if any connection/relevance, but Just In Case.

Training Centre Courage Test

• One of the listed locations is Osaek Mineral Spring, which is actually in Osaek-ri, Yangyang-gun, Gangwon-do, and within Seoraksan National Park...
• Which is to say, it's actually not too far from a Supernatural Disaster Management Bureau facility... As well as Daecheongbong Peak, where the Tiger General is summoned from.
• .... I'm a little mad I didn't catch that detail until now lol. Guess that's why BDS wrote the Bureau connection in...
• Having said that, in Soleum's memorised records, the retreat is supposed to be in the outskirts of Gyeongsangnam, not in Gangwon.. Ghost stories do what they want. (Grimaces at futile map making)
• Wonder if those lost to the light, were recovered by the recycling... Will Soleum come across them again... The Busan Tteokbokki mister whose ghost possessor does a strange kabedon on Soleum... Seong-gil, Jung-seok... ^I'm just somewhat paranoid whenever BDS does give out names of bit characters, don't mind me.

Soleum's digging...

• Digs into dirt to bury the wooden doll...
• Digs the door handle out of Room Z990~999's floor, in the aftermath of the water ghost haunting...
• Digs into the wall later on...
• ...Are you possessed by a certain little fox or something, Soleum sir....
• Did see speculation that maybe he had left himself clues in the previous recycling loops, ie. the door handle...

Z990~999 Room and Ho Yuwon

• Z999's room is bleak for a place that used to be part of Ho Yuwon's office.
• Interestingly though, in Chapter 144, Yuwon is nostalgic for an abandoned thatched cottage with "worn dirt walls, paper sliding doors, exposed rafters, and [a] moldy wooden floor", and also says that looking at Soleum reminds him of his past self...
• ...so maybe in a weird way, the room reverted to a state closer to Yuwon's roots, buried secrets and all.
• ...Is Soleum really echoing Yuwon's behaviour again in Part 3?

Namhae Employee Salary

• The people in charge only get paid in points, according to Jin Nasol. No cash. Wow.... ....anyway Section Chief Baek Saheon should be fine.

Timeline?

• Jin Nasol says it's been three years since Kim Soleum and Ho Yuwon disappeared.
• Was assumed that she had been here since 16 days ago, but really she was transferred 6 months ago.
• Director Cheong also disappeared 6 months ago.
• The apocalyptic event that ends the world is a containment failure? And was supposed to happen in 3 years or so, after Soleum left. Soleum isn't being very exact about this.

Soleum's memorisation of DER wiki entries

• He's doing this without the pop socket...?
• He did mention a few times that his memorisation was good.
• He also did back them up on his smartphone, right before he re-entered the pop-up store, and the merch box was with him in the dream.... Maybe they were kind of absorbed into Soleum when he got ported into the Namhae branch, like when he was 130666?
• Anyway, it's still... Extraordinary.

Ho Yuwon and Pop-up Store

• This isn't really sustained by Part 3, but in Part 1 Chapter 206 when Ho Yuwon gives the three Wish Potions to Soleum, he does so with a strangely salesperson-like flourish.
• He wraps them up with a ribbon, boxes them, and bags them in a black paper bag.
• Soleum feels deja-vu from the presentation, but dismisses it.
• It really does feel a little like how the pop-up store employee(s) treated Soleum though?

The canonical passages, Chapter 206 :

With a bright smile, Director Ho took a box out of the briefcase and began packing the Wish Ticket bottles one by one, tying them with a ribbon and placing them into a bag, as efficiently and neatly as a salesperson.

“Instructions for use are included in the box! I’ll put one bottle in each compartment.”

Director Ho tidied up the box with swift, practiced motions, closed it with a ribbon, slipped it into a bag, and slid it across the table to me.

“Here you are.” “…Thank you.”

I picked up the bag. For a moment, I felt a strange sense of déjà vu. ‘…I did it.’ It was finally starting to feel real, that I had finally gotten my hands on it. It’s here, in this black paper bag.
I got my Wish Ticket.

“Get home safely, Soleum-nim. I’ll be in touch.”

^(If you saw this posted earlier... No you didn't... ....i keep accidentally clicking post instead of update draft, 💀)

Extra:

• As of Ch407, we now know that >!Soleum left behind some eggshells and the Bureau kept them at a secret garden in Daecheongbong Peak, Seoraksan. However, the eggshells were stolen.!<
• So perhaps BDS means to lead up to this eventually, with their vague circumventing around Seoraksan and Daecheongbong....

This post feels incomplete but let's just post, ha,