Vulcan/packages/vulcan-ui-bootstrap/lib/components/forms/Time.jsx

import React, { PureComponent } from 'react';
import PropTypes from 'prop-types';
import DateTimePicker from 'react-datetime';
import { Components, registerComponent } from 'meteor/vulcan:core';

class Time extends PureComponent {
  constructor(props) {
    super(props);
    this.updateDate = this.updateDate.bind(this);
  }

  updateDate(mDate) {
    // if this is a properly formatted moment date, update time
    if (typeof mDate === 'object') {
      this.context.updateCurrentValues({ [this.props.path]: mDate.format('HH:mm') });
    }
  }

  render() {
    const date = new Date();

    // transform time string into date object to work inside datetimepicker
    const time = this.props.value;
    if (time) {
      date.setHours(parseInt(time.substr(0, 2)), parseInt(time.substr(3, 5)));
    } else {
      date.setHours(0, 0);
    }

    return (
      <Components.FormItem {...this.props.inputProperties}>
        <DateTimePicker
          value={date}
          viewMode="time"
          dateFormat={false}
          timeFormat="HH:mm"
          // newDate argument is a Moment object given by react-datetime
          onChange={newDate => this.updateDate(newDate)}
          inputProps={{ name: this.props.name }}
        />
      </Components.FormItem>
    );
  }
}

Time.propTypes = {
  control: PropTypes.any,
  datatype: PropTypes.any,
  group: PropTypes.any,
  label: PropTypes.string,
  name: PropTypes.string,
  value: PropTypes.any,
};

Time.contextTypes = {
  updateCurrentValues: PropTypes.func,
};

export default Time;

registerComponent('FormComponentTime', Time);