Is calendarize a word?

I accidentally used it in a text message. And it wasn’t flagged?

So I googled it and it had it. 

Thought that was odd; like me. So I went to my bookmarked dictionary site.

https://www.merriam-webster.com/

https://www.merriam-webster.com/dictionary/calendarize

NG

So then I tried another site. 

http://www.dictionary.com/browse/calendarize

calendarize. Dictionary.com. Dictionary.com Unabridged. Random House, Inc. http://www.dictionary.com/browse/calendarize (accessed: April 8, 2017).

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So now I have TWO dictionaries bookmarked and I didn’t invent anything.

Sigh! So sad.

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