Board Thread:General Discussion/@comment-28211557-20160310122940/@comment-30438304-20161213090816

Gabi wrote: The numbers on their nicknames aren't necessarily related to their birth years, but it makes sense for the game to take place in - or shortly after - 211X because, when Sans first talked to Toriel, she laughed like she hadn't heard such a good joke in 100 years. Now, that, out of context, would still be extremely vague, but Sans has an uncanny ability to figure out precise details from other people's reactions, so he may have known exactly how long Toriel had been in the ruins from her laughter alone. Now, that happened before the 7th human died - because Sans and Toriel talked to each other a few times before she started crying and asked him to promise to protect any humans who came out of the ruins - and Toriel said it had been a long time since a human fell into the Underground, so I'd say it was at least a few years after 211X. Yes, but that doesn't mean she HASN'T heard a good joke in a hundred years.

He does have that ability ? Well, we only see the abillity when it comes to us, and how much times we have died from him. That's not a very precise detail.

Anyways, it doesn't even matter. This is a logical fallacy. You're assuming that they use the same system of dates as the humans, which is unlikely. If Toby Fox truly wanted to hide the year or something, we would all know that 201X is equal to 2015, but that's just stupid. I think it's more plausible that it's how much time has passed since the war, or something like that.

I think you meant before that time, since that's when UNDERTALE takes place according to you. While I don't have concrete proof for this, it's also possible that she told that to Sans after we left the Ruins.