How to change render day contents?

[Leonardoperrella]

I'd like to change render day contents. basically add left zero on days 01, 02, 03, 04, 05, 06, 07, 08, 09

[Leonardoperrella]

const zeroPad = (num: number, places: number) =>
    String(num).padStart(places, "0");

const formatDay: DateFormatter = (day) => zeroPad(day.getDate(), 2);


<Calendar
    selected={date}
    onSelect={setDate}
    mode="single"
    formatters={{ formatDay }}
  />