Best way to get "This Weekend" or "Next Weekend" ?

What's the most efficient way to get "This Weekend" or "Next Weekend" (in North America?) ?

Essentially "This Weekend" means Saturday and Sunday coming up (in a few days), although in some contexts (e.g. an app showing events) sometimes this also includes Friday. Similarily, "Next Weekend" is the same thing but add on another week.

Start by reviewing Day.js's existing date and time APIs and plugins to determine how weekend ranges are currently represented. Clarify the definitions of “This Weekend” and “Next Weekend,” including whether Friday is included, then establish the desired API behavior and tests before implementation.

Written by the indexing model from the issue text.