Add counter to calendar day

[n-osennij]

If pass to events 2 same dates is it possible to show counter?

events: [
        {
          title: 'Event 1 - 2022-01-19',
          start: '2022-01-19',
          end: '2022-01-19',
          repeat: 'never',
          categoryId: 1
        },
        {
           title: 'Event 2 - 2019-04-02',
          start: '2022-01-19',
          end: '2022-01-19',
          repeat: 'never',
          categoryId: 1
        },
]

Example. In array 2 events in one category with the same date (2022-01-19)