So there have been rumors going around about NES Golf being secretly in every Switch. Weird. Quirky. Seems legit. However cracking how it happened is a bit interesting.... This Arstechnica article linked below details it all. The most fascinating and touching factor is the fact that it appears to only work one day a year, the day Satoru Iwata died. It just so happens that he programmed NES Golf entirely himself. Coincidence? I'd think not. Japanese gamers are calling it an "Omamori" which is something typically bought at shrines for various reasons, and if you keep one close to you it will protect you or give you luck. So the idea is that Nintendo placed this game in here to watch over every unit and the company as a whole. How beautiful is that?
We miss you Mr. Iwata! Here's a snippet from the full article but I recommend you go give it a read.
Arstechnica wrote:On Tuesday, yellows8 updated the Switchbrew wiki with purported details of the "official" emulator unlocking method. According to yellows8, the method is designed to only work one day a year—July 11, the day Satoru Iwata died—in a way that seems hard for most Switch owners to get around.
As yellows8 writes: "The loaded date originates from network-time-sync'd time, regardless of whether the user has it enabled or not. When the system was never connected to the Internet, it comes from the user-specified date instead. This is loaded from the time service-cmds, with the actual time-sync being handled by NIM."