daynames.rb(date)

Date::DAYNAMES is an array that holds the names of the days of the week in the English language. This constant offers a convenient method for developers to retrieve the names of the days without having to manually define them.

Execution:

require 'date'
#=> true
Date::DAYNAMES
#=> ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]

Executed with Ruby 3.3.6