update json path

        var day_map = {};

        // JSON is from https://github.com/NateScarlet/holiday-cn

        // need to update by year

        $.getJSON("2021.json", function (data) {

        $.getJSON("/2021.json", function (data) {

            for (let i = 0; i < data.days.length; i++) {

                item = data.days[i];

                day_map[item.date] = item.isOffDay;