use format("YYYY/wo") to get the wrong Value

[selye]

Describe the bug 通过 locale("zh-cn").format('YYYY/wo')进行格式化的时候，23年1月1号显示为2023年52周，显示有问题。 https://codesandbox.io/s/objective-wildflower-539cvn?file=/src/App.js

Expected behavior A clear and concise description of what you expected to happen. 期望得到22年第52周

Information

• Day.js Version [e.g. v1.11.7]
• OS: [e.g. iOS]
• Browser [e.g. chrome 62]
• Time zone: [e.g. GMT-07:00 DST (Pacific Daylight Time)]

[Summer-Shen]

Similar issue here -- not sure if this is related to how week numbers work together with weekStart +1，不知道这是否与 weekStart 对 week() 的影响有关

const dayjs = require("dayjs");
const weekOfYear = require("dayjs/plugin/weekOfYear");
const updateLocale = require("dayjs/plugin/updateLocale");
const advancedFormat = require("dayjs/plugin/advancedFormat");

dayjs.extend(weekOfYear);
dayjs.extend(updateLocale);
dayjs.extend(advancedFormat);

dayjs.updateLocale("zh-cn", {
  weekStart: 7, // week starts at Sunday
});

function parseDateToWeekNumber(date) {
  return dayjs(date).locale("zh-cn").format("YYYY-wo");
}

console.log(parseDateToWeekNumber("2025-12-31")); // 2025-1st
console.log(parseDateToWeekNumber("2026-01-01")); // 2026-1st

[Summer-Shen]

@selye

Workaround: use gggg instead of YYYY, see docs for more details. 解决方法：使用 gggg 代替 YYYY，详情参见 文档。

const dayjs = require("dayjs");
const weekOfYear = require("dayjs/plugin/weekOfYear");
const updateLocale = require("dayjs/plugin/updateLocale");
const advancedFormat = require("dayjs/plugin/advancedFormat");
const weekYear = require("dayjs/plugin/weekYear");

dayjs.extend(weekOfYear);
dayjs.extend(updateLocale);
dayjs.extend(advancedFormat);
dayjs.extend(weekYear);

dayjs.updateLocale("zh-cn", {
  weekStart: 7, // week starts at Sunday
});

function parseDateToWeekNumberWithWeekYear(date) {
  return dayjs(date).locale("zh-cn").format("gggg-wo");
}

console.log(parseDateToWeekNumberWithWeekYear("2025-12-31")); // 2026-1st
console.log(parseDateToWeekNumberWithWeekYear("2026-01-01")); // 2026-1st