Correct spelling, explanation: calendar is a word of Latin origin as it comes from the forms kalendae and kalendarium, which could be translated as account book. Calendar also appeared in Old French in the form calendier and then, in the Middle Ages, the word finally reached English. Today, it is a widely used noun.

Definition of calendar:
1. noun – a table with all the days in a year,
She bought a beautiful calendar for 2023 with some of the most beautiful images of the world.
2. noun – a book that has a separate page for each day, where you can note down your future plans, etc.,
I would die without my calendar, I have there all my important arrangements.

Expressions with calendar:
A few common expressions with calendar include: calendar month, calendar year, and Advent calendar.
The salary in our company is always paid on the second week of each calendar month and so far it has never been late.
All the employees get a pay rise at the beginning of each calendar year so everybody is looking forward to that time of the year.
Since my daughter was born I’ve prepared for her a beautiful Advent calendar each year and she absolutely loves it.

Incorrect spelling, explanation: a common spelling mistake in the word calendar is to spell it with an -e letter instead of an -a letter in the last syllable, which results in a wrong form calender. It is probably the consequence of the pronunciation, which indeed might suggest that there is an -e sound, but when it comes to the spelling, the only correct version is calendar.

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Incorrect spelling

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Incorrect spelling

Incorrect spelling