eris/utils/formatOrdinal.ts

export function formatOrdinal(n: number) {
  if (n % 100 === 11 || n % 100 === 12 || n % 100 === 13) return `${n}th`;
  if (n % 10 === 1) return `${n}st`;
  if (n % 10 === 2) return `${n}nd`;
  if (n % 10 === 3) return `${n}rd`;
  return `${n}th`;
}