// 原始代码functionconvertToUTC(date){returnnewDate(date).toISOString();}// 优化后的代码functionconvertToUTCOptimized(dateString){constdate=Date.parse(dateString);returnnewDate(date).toISOString();} 1. 2. 3. 4. 5. 6. 7
为此，Date类型使用UTC (Coordinated Universal Time，国际协调时间[又称世界统一时间]) 1970年1月1日午...
尽管它叫Date，但它其实是用来处理time的。datetime >>> from datetime import datetime >>> now = d...
如现在时间为Date: Fri, 08 Nov 2002 09:42:22 +0800 ,根据公式 UTC + 时区差 = 本地时间 UTC = 本地时间 - 时区差 0942 - (+0800) = 0142 即UTC是当天凌晨一点四十二分二十二秒 getTimezoneOffset 在Javascript中,Date对象提供了获取本地与UTC(GMT)时间差的函数getTimezoneOffset,该方法可返回格林威...
toLocaleTimeString():将 Date 对象转换为指定格式的时间字符串。 options:设置日期和时间的显示格式,例如两位数的年份、月份和日期。 关系图 为了更好地理解时间转换的流程,我们可以用下面的关系图(ER图)来表示: UTC_TimeDatedateStringtimeLocal_TimeDatedateStringtimeconvertsTo ...
// UTC to China + 8constconvertUTCTimeToChinaTime= () => {constdate =newDate()constcmtTime = date.toGMTString()// GMT+0800 (China Standard Time)// 480 分 = 60 分/时 * 8 时// return new Date(utcTime +480);conststr =newDate(`${cmtTime}+0800`).toGMTString();consttime = str...
// function to calculate local time// in a different city// given the city's UTC offsetfunction calcTime(city, offset) {// create Date object for current locationd = new Date();// convert to msec// add local time zone offset// get UTC time in msecutc = d.getTime() + (d.get...
function calcTime(city, offset) { // create Date object for current location var d = new Date(); // convert to msec // add local time zone offset // get UTC time in msec var utc = d.getTime() + (d.getTimezoneOffset() * 60000); // create new Date object for different city...
Date.UTC(year,month,day,hours,minutes,seconds,millisec) Date.UTC() is a static method of the Date object. You cannot use it on a date like d.UTC() The syntax is always Date.UTC(). Parameter Values ParameterDescription yearRequired. A four-digit value representing the year, negative valu...
Date is earlier than secondDate)console.log(firstDate>=secondDate)// false (firstDate is earlier than or equal to secondDate)console.log(firstDate<=secondDate)// true (firstDate is later than or equal to secondDate)console.log(firstDate==secondDate)// false (firstDate is not equal to ...