Courts have no almanacks.

An almanack gives dates that a person can look up. The proverb says courts offer no comparable guide to when things there will happen.

Its point is uncertainty about timing: consulting a calendar will not reveal when an event at a court is going to occur. It does not identify any particular event.

Use the proverb as a remark when the timing of something at a court cannot be foreseen. It cautions against treating a calendar as a way to predict when that event will happen.