Calendar vs. Calender
Use “calendar” for dates, schedules, or a system of organizing the year. “Calender” is a different technical word, not the ordinary spelling for a date calendar. Do not label every “calender” as a typo: it has legitimate specialist meanings, but those meanings are unrelated to dates and schedules.
Use “calendar” for dates, schedules, or a system of organizing the year. “Calender” is a different technical word, not the ordinary spelling for a date calendar.
Key details
Choose the right form
| Meaning / situation | Construction | Decision |
|---|---|---|
| dates, schedules, appointments, or the organization of the year | calendar | use “calendar” |
| specialist machine/process term unrelated to dates | calender | use only for that technical meaning |
Quick tests
Dates test
Are you talking about dates, months, appointments, or scheduling?
If yes: Use “calendar.”
If no: “Calender” is a legitimate technical word in other contexts, so do not call every occurrence a typo.
Caveat: The common spelling error matters only when the intended meaning is the date/schedule word.
Examples
Add the meeting to your calendar.
The word concerns scheduling.
The academic calendar lists the term dates.
The date-system word is “calendar.”
The factory uses a calender in the finishing process.
“Calender” has a separate technical meaning and is not always a misspelling.
Further guidance
Core difference
Use “calendar” for dates, schedules, or a system of organizing the year. “Calender” is a different technical word, not the ordinary spelling for a date calendar.
Fast Test
If you mean dates, months, appointments, or scheduling, choose “calendar.”
Usage Boundary
Do not label every “calender” as a typo: it has legitimate specialist meanings, but those meanings are unrelated to dates and schedules.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Calendar — Merriam-Webster (opens in a new tab)Merriam-Webster · Dictionary evidence for calendar as a system, date table, schedule, and related verb.
- Calender — Merriam-Webster (opens in a new tab)Merriam-Webster · Dictionary evidence that calender is a separate industrial verb/noun for roller pressing, with an additional historical Sufi noun sense.