How to set the value of date from a calendar in react

Question

I have a react component Datepicker. What I want to do is set the value attribute of the input element when I clic on a date on the calendar. Here's how I'm using the Datepicker

<Datepicker
label={t('birthday')}
name="birthday"
showTimeSelect={false}
minDate="1/1/1920 00:00:00"
onChange={(ev) => {this.handleChangeDate(ev, 'birthday');}}
/>

And the function handleChangeDate:

  handleChangeDate = (date, name) => {
    const dateValue = date !== null ? date : '';
    this.setState({
      [name]: dateValue,
    });
  };