class Iro::Option

def self.expirations_list full: false, n: 5
  out = [[nil,nil]]
  day = Date.today - 5.days
  n.times do
    next_exp = day.next_occurring(:thursday).next_occurring(:friday)
    if !next_exp.workday?
      next_exp = Time.previous_business_day( next_exp )
    end
    out.push([ next_exp.strftime('%b %e'), next_exp.strftime('%Y-%m-%d') ])
    day = next_exp
  end
  return out
  # [
  #   [ nil, nil ],
  #   [ 'Mar 22', '2024-03-22'.to_date ],
  #   [ 'Mar 28', '2024-03-28'.to_date ],
  #   [ 'Apr 5',  '2024-04-05'.to_date ],
  #   [ 'Mar 12', '2024-03-12'.to_date ],
  #   [ 'Mar 19', '2024-03-19'.to_date ],
  # ]
end