Townsends has a video on flips. He might have used a historical word for it.

Your logic is correct, but you are off by 1.

0-1 is year 1
10-11 is year 11

ELI5 answer?

In the conventional calendar, there wasn’t a year zero and it wasn’t skipped. Zero is the moment in time that we use to begin counting time.

Think of an elementary school style number line: …-3_-2_-1_0_1_2_3… Each number is one year apart. This makes the numbers measure something like Age. If you are 3 years old, you can count 3 years between 0 and 3.

But a year is not an Age. It is the span of time between ages, and the years we name are actually the spaces between the numbers on the number line. So the first year (1 AD/CE) is the first space after zero (between 0 and 1), and the first negative year (1 BC/BCE) is the first space before the 0 (between -1 and 0).

Then there is the astronomical calendar, which does have a year zero. They get this by naming the year (the space on the number line) after the number to the right side of the space on the number line.

1. It’s established
2. It is a general purpose platform: it has personal posting, business listings, messaging, groups, communities, photos, news, clip format video, live streaming, p2p sales, business sales, event coordination and advertising, payment processing and cash sharing, games…
   Most other platforms do one or several of those things much better than FB, but FB is good enough for lots of people. It’s a one stop shop, and it does a fair job at cross pollinating the various aspects of its platform. It has enough stuff to keep to keep users engaged even if their interest wanes from one or more particular platform components.

Again?

I only see windows…

Totally normal. 21 was your last milestone, 22 was your first year of “I’m older than 21.” Everything after that will be fuzzy except for the decade milestones and maybe the half decade ones.

Yes. Yes it is.

Could be either depending on the order you watch them, but I’m really getting the giggles thinking about Rogue One ending with a record scratch and “I bet you are wondering how I got here!”

That’s what airplane mode is. Try it out in the control center. It doesn't disable my WiFi unless I had WiFi disabled when I last turned airplane mode off. Similar with Bluetooth except turning airplane off turns my Bluetooth on even if I had it off before.

Of course, an OS update or a reboot might reset the value of the previous WiFi state. 🤷‍♂️

Eventually, either the boulder or the hill will erode enough that the task will be trivial.