Àwọn

Fi àwọn ọjọ, àwọn àkókò, àwọn oṣù tàbí àwọn odun láti inú àwọn àyọkà ìṣàfarawé kọ̀ǹpútà.

Àwọn ààtò ìṣàmúlò-ètò

Àwọn Ìṣàmúlò-ètò

Àwọn àwọn ààyè-iṣẹ́

Àwọn àkókò

Àwọn oṣù

Àwọn Òdun

Àwọn ìṣàmúlò-ètò —

Ọjọ́ àìpẹ̀ —

Àwọn ààtò àtòjọ-ẹ̀yàn ISO (Y-MM-DD) —

Àwọn ìṣàmúlò-ètò —

Àwọn àwọn ààyè-iṣẹ́ —

Àwọn Àtòjọ-ẹ̀yàn àwọn ìṣàmúlò-ètò

Ńlà àwọn àwọn ààtò àtòjọ-ẹ̀yàn yìí?

Àkóónú ìṣàmúlò-ètò yìí

An add or subtract days calculator shifts a start date by a number of days — and optionally weeks, months and years — and shows the resulting calendar date, which day of the week it falls on, its day-of-year number and the net shift in days. It handles month lengths and leap years automatically, so "3 months from" the 30th or the 31st lands on a real date rather than an impossible one like 31 February.

The way it works is simple: pick a start date, choose Add or Subtract, and enter how many days, weeks, months or years to move. Years and months are applied first against the calendar, then the weeks and days are counted off one by one, so the answer respects the fact that months are 28–31 days long and that leap years have an extra 29 February. The result is a single shifted date together with its weekday, its ISO form (YYYY-MM-DD) and the total net movement in days.

For a worked example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days. People reach for this when counting a warranty or return window, a 30/60/90-day notice period, a due date 40 weeks from conception, a court or contract deadline, or simply "what date is 100 days from now".

Àwọn Àtòjọ-ẹ̀yàn

Bawo ní a ṣe lè fi àwọn oṣù hàn nínú àwọn àyọkà ìṣàfarawé àwọn àwọn àyọkà àwọn à

Months are added by calendar, not by a fixed number of days. Adding one month to 15 January gives 15 February. When the target month is shorter, the date rolls into the following month — 31 January plus one month lands in early March.

Àwọn ìṣàmúlò-ètò àwọn ìṣàmúlò-ètò

Ya. Tí a bá yọ̀ àwọn ọjọ́, àwọn àkókò àti àwọn oṣù láti inú ọdun lọ́wọ́lọ́wọ́ lọ́wọ́lọ́wọ́, a tí n bọ́ sílẹ̀ nínú àwọn ààyè oṣù lọ́wọ́lọ́wọ́, tí a bá fi àwọn oṣù lọ́wọ́lọ́wọ́ pamọ́ nínú àwọn oṣù kọ̀ǹpútà àti àwọn ọjọ́ ìtàn.

Ń lè fi àwọn ọjọ̀, àwọn àkókò, àwọn oṣù àti àwọn odun pọ̀?

Ya. Àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè

Àwọn ààyè-iṣẹ́ wò ní ọjọ́ 90 láti inú ààyè-iṣẹ́ kan?

Enter the start date, leave the operation on Add, and put 90 in the Days field. The calculator counts 90 calendar days forward — for example 90 days after 15 August 2025 is 13 November 2025 — and also names the weekday it lands on.

Ńlà àwọn oṣù ìtàn?

Ya. Ìfàdí àti ìṣàmúlò-ètò nínú 29 Febúàrẹ̀lì ní a tí n gbọ́rá, láti jẹ́ pé ìjánu-ìgbà kan láti 1́ Kọ́rẹ̀sì 2024 tí ó bá jẹ́ nínú 1́ Kọ́rẹ̀sì 2025, láti inú 2024 tí a tì ní ọjọ́ ìjánu-ìjánù kan.

Bawo ní yìí ṣe yatọ sí àwọn ìṣàmúlò-ètò ìyatọ́ àwọn ààtò àtòjọ-ẹ̀yàn?

Àtòjọ-ẹ̀yàn yìí náà náà gba àwọn ààyè-iṣẹ́ kan àti láti gbé wọn lọ́wọ́lọ́wọ́ láti rí àwọn ààyè-iṣẹ́ tuntun. Àwọn ààyè-iṣẹ́ ìṣàfarawe-àtòjọ-ẹ̀yàn náà náà gba àwọn ààyè-iṣẹ́ meji tí o mọ̀ láti fi àwọn ààyè-iṣẹ́ àti àwọn ààyè-iṣẹ́ àti àwọn ààyè-iṣẹ́ pamọ́.

Ń bá ṣé ìṣàmúlò-ètò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò àwọn ààtò

Kò. Àwọn àwọn ààyè ìṣàmúlò-ètò ní ankere, kò ní ọjọ̀ kan. Àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè

API — ló àwọn ìṣàmúlò-ètò yìí láti inú ìṣàmúlò-ètò

Fi àwọn ìṣàmúlò-ètò yìí kọ̀ǹpútà yìí láti jẹ́ ààyè-iṣẹ́ JSON tí a tí fi pamọ́ - kò ní bọ́tìnì kan tí a fẹ́. Fi àwọn fálù ààyè-iṣẹ́ sílẹ̀ sí bí àwọn àwọn ìṣàmúlò-ètò àti JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka àwọn àkọlé API kíkún →

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

GET https://calculator.free/api/v1/add-subtract-days/

curl

curl "https://calculator.free/api/v1/add-subtract-days/?start=2026-10-09&operation=add&days=30"

JavaScript `fetch()`

const r = await fetch(
  "https://calculator.free/api/v1/add-subtract-days/?" + new URLSearchParams({
    "start": "2026-10-09",
    "operation": "add",
    "days": "30"
  }));
const data = await r.json();
console.log(data.results);

Results are estimates for general guidance only, not financial, medical or tax advice.

Àkóónú ìṣàmúlò-ètò yìí

Àwọn Àtòjọ-ẹ̀yàn

Àwọn Ìṣàmúlò-ètò Ìṣàmúlò-ètò

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

curl

JavaScript fetch()

JavaScript `fetch()`