Inform me.
Today is already two shifts, and there is still one shift left.
However, I should be out of the country tonight to be a cowherd, and I can't be sure when I will come back. So say it in advance, if you don't have time to make up for the third shift tonight, you will make up for the fourth shift tomorrow.
Of course, there is another outbreak of five watches this week. Tentatively scheduled for the weekend.