That's one option. But Sandwiches' is valid too, as it ends in an s and is a proper noun, it's not exclusive to plurals. AP style guide for example requires it (and got a lot of flack when 's was proposed as acceptable).

Plus sandwiches itself is a singular noun which is a plural word, so it's s' not s's for most cases there.

Anyway, grammar is weird.

[–] JackbyDev@programming.dev 3 points 4 months ago (1 children)

What we really need to know is how to make possessive plurals of proper nouns that are plural but refer to a single thing.

Imagine a club called The Backstreets. Is it The Backstreetses'?

What about how to make plurals of proper nouns that are possessive? Like a restaurant called Your Grandparents'. Is it Your Grandparents'es? What about the possessive plural? AYour Grandparents'es'?

[–] realbadat@programming.dev 3 points 4 months ago

I think it may 100% depend on alcohol and/or THC intake, both of the person writing it and the person reading it. I believe those are the accepted rules as written in both the New York Writing Style Guide and the Chicago Writing Style Guide.

I believe it fits under the section titled As the mood strikes; grammar's mishaps's and bewilderment