Javascript日期。当时间组件设置为零时,getUTCDate()返回不同的数字?

const d = new Date('2010-10-20');
console.log(d.getUTCDate());

控制台将记录日志 20

const d = new Date('2010-10-20');
d.setHours(0, 0, 0, 0);
console.log(d.getUTCDate());

然后 19

这是正确的吗?我期待着 20

This is a Stacblitz Demo

getUTCDate() 将记录预期结果:

const d3 = new Date('2000-10-20T00:00:00Z');
console.log(`D3: ${d3.getUTCDate()}`);