in src/date-picker/date-popup.tsx [190:210]
confirm(name: Field) {
const text = this.state.text;
let result;
if (name === 'time') {
result = this.parse(text, name);
const time = this.parse('time' in this.props ? this.props.time : '', 'time');
const emptyCase = this.state.active === 'time' ? '00:00' : null;
result = result || time || emptyCase;
} else {
result = this.parse(text, name);
if (!this.isValidDate(result)) {
result = this.parse(name in this.props ? this.props[name] : '', name);
}
}
this.select({
[name]: result,
});
}