If the Monday is a statutory holiday, then the Sunday directly before is the middle day of that long weekend.
If the Friday is the stat holiday, then the middle day is the Saturday directly following.
In the case of the Easter weekend, where Resident Doctors have both Friday and Monday as stat holidays, both the Saturday and Sunday in between are each a middle day.
You must work at least 8 hours between 0800 and 0800 on a middle day to claim it. As of October 10, 2018 in the new 2015-2017 CBA, your middle day in lieu can be used anytime in the academic year.
You cannot claim both a middle day and a stat holiday benefit within a 24 hour period. If there are more than 24 hours between them, you may claim both benefits.
On-Call Duty on the Middle Day of a Long Weekend
Where a Resident is scheduled for the middle day(s) of a long weekend, this person is entitled to a paid day(s) off. The paid day off must be arranged with the Program Director (or the Administrative Resident where this authority is delegated by the Program Director).
The on-call period on the middle day is defined as 0800 to 0800. Any Resident who works a minimum of eight (8) hours (in-house or out-of-house) on the middle day is entitled to a day off. When the middle day overlaps the statutory holiday from 2400 hours to 0800 hours, the Resident is entitled to claim the greater of the two (2) benefits. The Resident shall be entitled to claim only one (1) benefit in a twenty-four (24) hour period.
Paid or accrued days off must be taken before the end of the academic year in which they were accrued or be paid out. Christmas Day and New Year’s Day will not be considered in granting any paid day off.