when does a week start?
strange: today I have racked up 54 points but my total for the week according to the leaderboard is just 33. Does a week not start at midnight? and my profile says I'm +268 points for the week. confusing.
Also - I've experienced thinking I've ranked on my group leaderboard by midnight Saturday, only to find out that other members passed me on Sunday. My take is that Duolingo Club "weeks" reset Monday to be in line with most places' definition that a weekend includes both Saturday and Sunday. I think the whole "Sunday being the first day of the week" thing is a US mindset. It got me!
A "weekend" includes Saturday and Sunday everywhere that uses the common calendar. In the US and Canada, we include both ends of the week. In other places, the start of the week was moved to Monday so Saturday isn't at either end of the week. Yet people still call it part of the weekend even if it's not at either end.
Sunday as the first day of the week isn't a US thing. It dates back to the Hebrew Bible. On the seventh day he rested, and it's the Sabbath. Christians moved the day of rest to Sunday, and made Monday the first day of the week in most of the world.
Plenty of people have screwed with the calendar, such as moving the start of the year to January in the middle of winter. Yet it's still common for people to treat September as the actual start of the year, start school, come back from vacation/holiday, etc. The day used to end when the sun went down, and now we have two different kinds of days with different meanings. We have day, as opposed to night. And we have a 24 hour day where it's the same day after daytime ends but it's a new day starting in the middle of the night for no reason other than being as far from noon as possible.
Instead of going by local timezones, Duo goes by what time it is where most people don't live. So if it starts on Monday, that's the start of the work week in the US because Christians take Sunday off.