.isValid()&&!this._isUTC},yt.isUtcOffset=function(){return!!this.isValid()&&this._isUTC},yt.isUtc=Ca,yt.isUTC=Ca,yt.zoneAbbr=function(){return this._isUTC?"UTC":""},yt.zoneName=function(){return this._isUTC?"Coordinated Universal Time":""},yt.dates=t("dates accessor is deprecated. Use date instead.",lt),yt.months=t("months accessor is deprecated. Use month instead",Ae),yt.years=t("years accessor is deprecated. Use year instead",ze),yt.zone=t("moment().zone is deprecated, use moment().utcOffset instead....