&gt; Don&#x27;t people &quot;feel&quot; that Monday is the first day of the week because the weekend is over and they have to get back to work?<p>No, I feel that Sunday is the day of rest I start my week with, then I do some work, and finally I rest again: in that way my day is a microcosm of my week (and one might think that in a more primitive society my year would be a macrocosm, as I did more work spring-summer than during the winter).<p>I personally detest calendars which display Monday as the first day of the week, and am genuinely curious why ISO chose that.