devicelog_17.js

#terminal:
$npm install react-datepicker

...
import DatePicker from 'react-datepicker';
import "react-datepicker/dist/react-datepicker.css";
...

render(){
        return(
            <div>
                ...
                    <div className="form-group"> 
                        <label>Account Name: </label>
                        <select ref="accountInput"
                            required
                            className="form-control"
                            value={this.state.accountname}
                            onChange={this.onChangeAccountname}>
                            {
                                this.state.accounts.map(function(account) {
                                return <option 
                                    key={account}
                                    value={account}>{account}
                                    </option>;
                                })
                            }
                        </select>
                    </div>
                    ...
                    <div className="form-group">
                        <label>Date: </label>
                        <div>
                            <DatePicker
                            selected={this.state.date}
                            onChange={this.onChangeDate}
                            />
                        </div>
                    </div>

                ...
            </div>
        );
    };
};