CSS Mastery Recipient Portal Practice Test 2026 - Free CSS Mastery Practice Questions and Study Guide

Understanding how a chosen target delivery time becomes a time window: the system creates a window centered on that target, with one hour of leeway on either side, so you end up with a two-hour interval. This is why selecting one hour before and after the target time is the best match—it automatically yields a two-hour delivery window. The window is generated right after you pick the target time, keeping the timeframe close to your intended moment with balanced flexibility. Other descriptions describe wider, narrower, or differently scheduled windows (such as a four-hour span, exactly at the moment, or shifting to the next business day), which aren’t the automatic behavior in this scenario.