Miscalendar

Occasionally , counsel will miscalendar or simply forget about attending a judicial arbitration hearing ( Code of Civil Procedure $ 1141.10. ) and an adverse judgment occurs.

Source: wiktionary

The NLRB denied an employer's request that it accept its late filed brief based on excusable neglect where the employer asserted that the reason its brief was one day later was through an "inadvertent oversight" that led it to miscalendar the due date.

Source: wiktionary

I do not mean to condone procrastination and slothfulness on the part of attorneys, but as a former practicing attorney, I am aware of the problems of inept personnel who fail to calendar or miscalendar deadlines and the burden of determining priorities in the workload of a busy attorney.

Source: wiktionary

Apparently a reference to the death of Charles II led the 6th baron Monson to miscalendar these letters .

Source: wiktionary