For me I say that a truck with a cab longer than its bed is not a truck, but an SUV with an overgrown bumper.

  • American here: I fully accept that Monday as first day of the week makes more logical sense, but my brain can’t reverse years of programming. I get very confused and make mistakes if I look at a calendar that starts on Monday.

      • It’s just the old way of numbering the days of the week. Sabbath is the last day of the week in Judaism, a numbering Christianity continued to use, and Sabbath is Saturday. Early Christians came up with the idea to start the week with worship as well, so Sunday mass was added. Over time, Sunday mass became more prominent (probably also because people started to see Judaism negatively), but the numbering remained.

        The average modern person and cultures that weren’t “born” in the context of Christianity didn’t know that though, and saying all the special weekdays are at the end of the week is less complicated, especially in combination with the term “weekend” that grew to encompass both days, so most people and cultures count Sunday as the last day of the week now.

        Edit: Btw, in Judaism days start when the previous day’s sun sets, rather than at midnight or sunrise. This might be relevant for why Friday is a special day in Islam, as from our perspective, jews begin to follow their Sabbath rules on Friday evening.