Sumar o restar a una fecha
Suma o resta años, meses, semanas, días o días hábiles a cualquier fecha.
Resultado
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Regla de fin de mes
Si el día inicial no existe en el mes de destino, el resultado se ajusta al último día de ese mes. Por ejemplo, 31 de enero + 1 mes = 28 de febrero (29 en año bisiesto).
Ejemplos
- 2026-01-31 + 1 month = 2026-02-28 (month-end rule applied).
- 2024-01-31 + 1 month = 2024-02-29 (leap year).
- 2026-07-24 (Friday) + 3 business days = 2026-07-29 (Wednesday) — the weekend is skipped.
Preguntas frecuentes
What happens with January 31 + 1 month?
February has no 31st, so the result is clamped to the last day of February — the 28th, or the 29th in a leap year. The tool tells you whenever this month-end rule was applied.
How do business days differ from calendar days here?
In business-day mode the tool steps one weekday at a time, skipping Saturdays, Sundays, and (if you pick a country) its public holidays. Adding 5 business days to a Friday therefore lands on the following Friday, not on Wednesday.
Are years and months added before or after days?
Years and months are applied first (with month-end clamping), then weeks and days. This matches how contracts and deadlines are usually interpreted, and it makes the calculation explainable step by step.