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Día de la semana de una fecha

Averigua qué día de la semana cayó o caerá cualquier fecha histórica o futura.

Which weekday is a date?

Cómo funciona

  1. The weekday is computed on the proleptic Gregorian calendar (the international standard) directly from the parsed date, never from a millisecond difference.
  2. Centuries are handled correctly: 1900 and 2100 are not leap years (divisible by 100 but not 400), and the engine’s unit tests pin those cases down.
  3. The ISO week number and the day-of-year are shown alongside, since the three answers usually travel together in planning and reporting.

Información útil

  • Works across the full Gregorian range the engine supports, centuries back and forward.
  • Dates from eras that used the Julian calendar historically will not match historical local usage; the Gregorian assumption is stated rather than hidden.
  • Pair it with the Week Number tool for reporting weeks and the Business Days tool for working-day math.
Calculadoras de fechas

Calculadora de número de semana

Determina el número de semana ISO de cualquier fecha o el rango de fechas de una semana del año.

Abrir herramienta
Calculadoras de fechas

Diferencia entre fechas

Calcula la distancia exacta entre dos fechas en años, meses, semanas y días.

Abrir herramienta
Calculadoras de fechas

Días hasta una fecha

Calcula cuántos días faltan para un evento futuro o cuántos días han pasado desde una fecha.

Abrir herramienta
Calculadoras de fechasDestacada

Calculadora de edad

Calcula tu edad exacta en años, meses, días, horas y minutos transcurridos desde tu nacimiento.

Abrir herramienta

Preguntas frecuentes

How far back and forward does it work?
Across the full Gregorian calendar range supported by the engine, centuries back and forward, including leap-year exceptions like 1900 and 2100.
Is the Gregorian calendar assumed?
Yes, the proleptic Gregorian calendar, which is the international standard. Dates from eras using the Julian calendar will not match historical local usage.
Why does the weekday matter for planning?
Weekday drives business days, delivery windows, event scheduling, and recurring routines. The finder pairs with the Business Days and Week Number tools.