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:
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Source: https://xkcd.com/3232/
I think you’re both right, but this is a great reason for ISO8601. This weekend is the weekend in the current week. In most of the world it’s Monday-Sunday which makes this way clearer, in which case he would have said “next weekend” and you would be completely correct, but if you’re in a country that starts on a Sunday then “this weekend” is two things. Sunday and Saturday, with 5 days in between. Since you were already in part of the two parter you could only be referring to the next part, the upcoming Saturday, part of this week.