What week of the year is January 1, 2026?

{"url":"https://calcdate.live/whatweek/2026-01-01/","path":"/whatweek/2026-01-01","kind":"whatweek","title":"What Week Is January 1, 2026?","h1":"What week of the year is January 1, 2026?","generated_at":"2026-10-06T02:14:55+05:00","timezone":"Asia/Karachi","today":"2026-10-06","result":{"hero":{"value":"Week 1","unit":"ISO week of 2026","sub":"Dec 29 – Jan 4, 2026","text":true},"stats":[{"label":"ISO week","value":"W1"},{"label":"week starts (Mon)","value":"Dec 29"},{"label":"week ends (Sun)","value":"Jan 4"},{"label":"weeks in 2026","value":"53"},{"label":"week of the month","value":"1st"},{"label":"quarter","value":"Q1"},{"label":"weekday","value":"Thursday"},{"label":"days since week started","value":"281"}]},"inputs":{"kind":"whatweek","type":"whatweek","category":"calculator","date":"2026-01-01 00:00:00 PKT"},"method":"The result uses the exact inputs on this page and calendar/time arithmetic appropriate to this calculator. The result shown above is the value to use for this calculation.","milestones":[{"label":"Calculated date","date":"2026-01-01","display":"Thursday, January 1, 2026"}],"workdays":[{"label":"Calendar days","value":278},{"label":"Weekdays","value":198},{"label":"Saturdays","value":40},{"label":"Sundays","value":40},{"label":"Public holidays","value":"Not included unless this calculator says otherwise"}],"accuracy":["The result uses the calendar rules and time zone shown on this page.","Leap years and actual month lengths are handled by the calendar arithmetic where they affect the calculation."],"excel":{"formula":"","note":"This calculation does not have a single reliable built-in Excel/Google Sheets formula without reproducing the page’s specific time-zone or calendar rules."},"sections":[["Which week is it?",["Thursday, January 1, 2026 falls in ISO week 1 of 2026. That week runs from Monday Monday, December 29, 2025 to Sunday Sunday, January 4, 2026, and it touches December and January. The ISO year 2026 has 53 weeks in total, so this is week 1 of 53, or about 2% of the way through the ISO year."]],["How ISO week numbers work",["ISO 8601 weeks begin on Monday, and week 1 is the week that contains the first Thursday of the year. Because of that rule, the first days of January can belong to the last week of the previous year and the last days of December can belong to week 1 of the next. Most years have 52 weeks; roughly every five or six years a 53rd week is added to keep the count aligned with the seasons."]],["Planning by week",["Schedules in manufacturing, logistics, education and project management are often written in week numbers, for example a delivery in week 1 or a sprint that ends in week 3. The week began 281 days ago. Keep in mind that US calendars often start the week on Sunday and use a different rule for week 1, so week numbers can differ between countries."]],["Nearby weeks",["The week before is week 52 of the previous year, and the week after is week 2. The year pages list every week with its date range, and the week-number pages link to each of them."]]],"summary":"What Week Is January 1, 2026?: Week 1 ISO week of 2026 — Dec 29 – Jan 4, 2026","show_method":true}