xkcd #3232: Countdown Standard
Title text:
Anyone who is caught counting ‘three … two … one … zero … GO!’ will be punished with a lifetime of eating only ISO standard food samples.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3232/


There is a rule but it’s not really well known so people just follow whatever rule they deduced from usage. People have to qualify which one they mean almost every time. I usually say “this coming Thursday” (this week), or “Thursday next week” instead.
The rule makes perfect sense (and is how I’ve always used it), but this article actually misses a major point which I just learned last week when talking to some native Spanish speakers. In most English speaking countries, the week starts on Sunday. This isn’t the case for many, many other countries though. So saying “this Friday” on a Sunday really really confuses people. That’s exactly what happened to me last week because it was a Sunday and we were talking about a Friday and she got very very confused.
The day of the week shouldn’t matter, it’s either the Sunday that is coming up next or the one exactly a week after it. “This Sunday” should be the upcoming one and “Next Sunday” should be the one after. Doesn’t matter if it’s this week, next week or in two weeks.