this;switch(t=this._isUTC?it:dt,e){case"year":a=t(this.year()+1,0,1)-1;break;case"quarter":a=t(this.year(),this.month()-this.month()%3+3,1)-1;break;case"month":a=t(this.year(),this.month()+1,1)-1;break;case"week":a=t(this.year(),this.month(),this.date()-this.weekday()+7)-1;break;case"isoWeek":a=t(this.year(),this.month(),this.date()-(this.isoWeekday()-1)+7)-1;break;case"day":case"date":a=t(this.year(),this.month(),this.date()+1)-1;break;case"hour":a=this._d.valueOf(),a+=36e5-rt(a+(this._isUTC?0:6e4*this.utcOf...