test('format ordinal', () => {
  assert.equal(moment([2011, 0, 1]).format('DDDo'), '1-чи', '1st');
  assert.equal(moment([2011, 0, 2]).format('DDDo'), '2-чи', '2nd');
  assert.equal(moment([2011, 0, 3]).format('DDDo'), '3-чү', '3rd');
  assert.equal(moment([2011, 0, 4]).format('DDDo'), '4-чү', '4th');