if (x.getTime() == y.getTime()) {
It'll be true;
}

= beforeSpringDate.getTime() && time <= afterSpringDate.getTime()) { result = true; break; } }

var input = new Date(2012,1);new Date(input.getFullYear(),29).getDate() === 29
true

var input = new Date(2013,29).getDate() === 29
false

var input = new Date(2014,5,6,29).getDate() === 29
false

var input = new Date(2016,29).getDate() === 29
true

var input = new Date(2000,29).getDate() === 29
true

function inNationalDay(date) {
var result = {
beforeNationalDay: false,duringNationalDay: false
};
if (date) {
var month = date.getMonth() + 1,day = date.getDate();
if (month == 9 && (day >= 24 && day <= 30)) {
result.beforeNationalDay = true;
} else if(month == 10 && (day >= 1 && day <= 7)) {
result.duringNationalDay = true;
}
}
return result;
}

function inSpringFestival(date) {
var result = {
beforeSpringFestival: false,duringSpringFestival: false
};
if (date) {
// set GMT+0800 hours(set china hour +8)
date = new Date(date.getFullYear(),date.getMonth(),date.getDate(),8);
var time = date.getTime();
var springFestivalDays = ['2015-02-19','2016-02-08','2017-01-28','2018-02-16','2019-02-05','2020-01-25','2021-02-12','2022-02-01','2023-01-22','2024-02-10'];

var springDay,springDate,beforeSpringDate,afterSpringDate;
for (var i = 0; i < springFestivalDays.length; i++) {
springDay = springFestivalDays[i];
springDate = new Date(springDay);
beforeSpringDate = new Date(springDay);
beforeSpringDate.setDate(beforeSpringDate.getDate() - 7);
afterSpringDate = new Date(springDay);
afterSpringDate.setDate(afterSpringDate.getDate() + 7);
if (time >= beforeSpringDate.getTime() && time < springDate.getTime()) {
result.beforeSpringFestival = true;
break;
} else if (time >= springDate.getTime() && time < afterSpringDate.getTime()) {
result.duringSpringFestival = true;
break;
}
}
}

return result;
}

holiday.cache = {
lastUpdateDate: null,beforeHoliday: false,duringHoliday: false
};

holiday.checkHoliday = function() {
var now = new Date();
if (!holiday.cache.lastUpdateDate) {
holiday.cache.lastUpdateDate = now;
var nationalDayResult = inNationalDay(now);
var springFestivalResult = inSpringFestival(now);
holiday.cache.beforeHoliday = nationalDayResult.beforeNationalDay || springFestivalResult.beforeSpringFestival;
holiday.cache.duringHoliday = nationalDayResult.duringNationalDay || springFestivalResult.duringSpringFestival;
} else {
var lastUpdateDate = holiday.cache.lastUpdateDate;
var cacheDate = lastUpdateDate.getFullYear() + '' + lastUpdateDate.getMonth() + '' + lastUpdateDate.getDate();
var nowDate = now.getFullYear() + '' + now.getMonth() + '' + now.getDate();
if (cacheDate != nowDate) {
holiday.cache.lastUpdateDate = now;
var nationalDayResult = inNationalDay(now);
var springFestivalResult = inSpringFestival(now);
holiday.cache.beforeHoliday = nationalDayResult.beforeNationalDay || springFestivalResult.beforeSpringFestival;
holiday.cache.duringHoliday = nationalDayResult.duringNationalDay || springFestivalResult.duringSpringFestival;
}
}
};

module.exports = holiday;

var s = '2011-11-17'; alert( "今天星期 "+"天一二三四五六 ".charAt(new Date(s).getDay())); alert("星期 " + new Date(s).getDay());