To enter or register something in a calendar; to schedule or record dates.
From en- + calendar (from Latin calendarium, literally 'account book,' from calendae, the first day of the month). A rare term for putting events into a calendar system.
This super-rare word shows how the 'en-' prefix was once used to create verbs from almost ANY noun—you could encalendar an event, just like you could enshrine an idea. We stopped doing this, but medieval English loved it!
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