I-Calculator yenombolo yeviki
Thola inani leviki le-ISO kanye nemini yeminyaka nganoma yisiphi isikhathi.
Iziphetho zivuselelwa uma ubhala.
Malunga nale khadi
A week number calculator returns the ISO 8601 week number for a date — the standard used across business, logistics and Europe, where weeks run Monday to Sunday and week 1 is the week containing the first Thursday of the year. It also gives the ISO week-numbering year, the calendar quarter, the day-of-year number and how many weeks are left in the year.
Under the ISO rule a year has 52 or 53 weeks, each running Monday to Sunday, and week 1 is defined as the week that holds the year’s first Thursday (equivalently, the week containing 4 January). This is why a date in the first days of January can still belong to the last week of the previous year, and a late-December date can already sit in week 1 of the next year — the tool reports the ISO week-numbering year separately so that mismatch is clear.
For example, 1 January 2026 falls in ISO week 1 of 2026, but 1 January 2023 (a Sunday) sits in ISO week 52 of 2022. Manufacturing, shipping, publishing and European payroll systems schedule by these "CW" or "KW" week numbers, so this is the tool for answering "what week number is it", planning a delivery for "week 34", or checking which quarter a date belongs to.
Imibuzo ebuzwa kaningi
Uyini umkhawulo wesonto ISO?
Nge ISO 8601 amaviki aqala ngoMsombuluko futhi amaviki 1 yiwo amaviki aqukethe uLwesihlanu wokuqala wonyaka — ngokufana, amaviki aqukethe uJanuwari 4. Lokhu kusho ukuthi ukuqala kukaJanuwari nokuphela kukaDesemba kungaba yiminyaka ezungeze.
Kungani unyaka we-ISO uhlukile kunyaka wekhalenda?
Dates in the first days of January can fall in the last ISO week of the previous year, and late-December dates can fall in week 1 of the next year. The ISO week-numbering year reflects which year the week belongs to.
Imini ephi izinsuku zonyaka?
Ikota yikota yekhalenda yehora elijwayelekile: Q1 nguJanuwari-March, Q2 April-June, Q3 July-September ne Q4 October-December.
Ingabe kuneviki ezingu-100 ngonyaka?
Nge ISO 8601 unyaka uneviki ezingu-52 eminyakeni eminingi ne-53 engxenyeni (lapho uJanuwari 1 noma unyaka odlulele uDisemba 31 udlula ngeSonto). Ithuluzi litshela ukuthi zingaki izinsuku ze-ISO ezishiwo ngonyaka odlule.
Yini ushintsho phakathi kwe ISO ne US week numerating?
ISO amaviki aqala ngoMsombuluko ngeviki 1 ligcina i-Thursday yokuqala. I-US convention ejwayelekile iqala amaviki ngoLwesihlanu futhi ibiza iviki le-1 January iviki 1. Le calculator isebenzisa i-ISO standard, ngakho amanombolo angahluka ngomunye kusuka ku-US calendar.
Yini okusho i-CW noma i-KW kwikhalenda?
CW (iviki lekhalenda) neJalimane KW (Kalenderwoche) yimibhalo kuphela yenombolo yeviki le-ISO — CW 34 yiviki le-ISO 34. Faka noma yikuphi usuku kulolu viki ukuze uqinisekise ukuthi CW/KW liyilungu.
API — sebenzisa le calculator kusuka kukhodi
Nquma le calculator njenge JSON evulekile yendawo yokuqeda - akukho isithonjana esidingekayo. Thumela amaxabiso endawo ngezansi njengezilungiselelo zombuzo noma i-JSON. Noma yini ongayishiya isebenzisa iphutha elifanayo elifakwe ngaphambili lekhasi; ipharamitha engaziwa yi-400, ayikho i-zero emnyama. Funda i-API egcwele →
Ingxenye yendawo
GET https://calculator.free/api/v1/week-number/curl
curl "https://calculator.free/api/v1/week-number/?date=2026-09-08"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/week-number/?" + new URLSearchParams({
"date": "2026-09-08"
}));
const data = await r.json();
console.log(data.results);Izibalo ziyisilinganiso esisetshenziswa ukuqondisa kuphela, hhayi ukucebisa ngezimali, ukwelashwa noma ukukhokha.