Intercalary day

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(Med.) one on which no paroxysm of an intermittent disease occurs.
- Mayne.

See also: Intercalary

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The fraction was taken care of by running a cycle of three 365-day years followed by a "leap" year of 366 days, with the extra or intercalary day added as February 29.
The most recommended physical activity for people with DM is aerobic exercise, which should be performed at least three intercalary days a week, or daily if possible, with a minimum duration of 20 minutes daily for the benefits to be gained, reaching 60 minutes or more, depending on the pre-exercise blood glucose level.
The occasion also marked the annual Baha'i Intercalary Days, a period specifically dedicated to service and hospitality.