I live in Redmond, WA. Frankly, if someone asked to meet for a meal at eighteen, I would assume they would like to get together in a Microsoft cafeteria closest to the (what I believe to be non-existent) Building 18. My backup option would be to assume that they have received a hard blow to the head at some point in their life.

Again, whether I would understand them or not, no one to my knowledge speaks like that in U. S. English. It is a great example to use to show the quirks of language. It is a bad example to use to show that Siri "doesn't even support 24 hour time - at least in English".

I'm not English. We don't say eighteen hundred for 18:00, we say just eighteen. And I don't have localized Siri.

And in any case i said eighteen not eight a m.

Officially building 18 does not exist. Anything you may have heard about building 18 is just rumour. If you have any questions regarding the purpose of building 18, you should direct them to Shelley in HR.

Hey, it's been well over a decade since I worked there. :-)

https://campusbuilding.com/b/microsoft-building-18/

"report to Shelley in HR for re indoctrination" would be better :)