Function utcDate

packages/billing/src/__tests__/subscription.test.ts:31–34

(year: number, month: number, day: number)

// Helper to create a UTC date on a specific day-of-week
// dayOfWeek: 0=Sun, 1=Mon, ..., 6=Sat
function utcDate(year: number, month: number, day: number): Date {
  const d = new Date(Date.UTC(year, month - 1, day))
  return d
}

function createMockSubscription(overrides?: Partial<{
  stripe_subscription_id: string