The Date#toDateString method would result always returns in that particular format.

因此，您需要使用其他可用的方法来生成，或者可以使用几种方法来删除，

So either you need to generate using other methods available or you can remove using several ways,

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1.使用 String#split 代码> ， Array#slice 和 Array#join

var mydate = new Date('29 Feb 2020');
// split  based on whitespace, then get except the first element
// and then join again
alert(mydate.toDateString().split(' ').slice(1).join(' '));

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2.使用 String#replace 代码>

var mydate = new Date('29 Feb 2020');
// replace first nonspace combination along with whitespace
alert(mydate.toDateString().replace(/^\S+\s/,''));

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3.使用 String#indexOf 代码> 和 String#substr

var mydate = new Date('29 Feb 2020');
// get index of first whitespace
var str = mydate.toDateString();
// get substring
alert(str.substr(str.indexOf(' ') + 1));