Students look for the month with the gentlest curve. It does not exist: both tests are equated so that a given scaled score means the same thing whenever you sit it. A date cannot be easier.
What a date can be is well or badly placed, and that is worth getting right.
The three things that should decide it
1. Your preparation block ends on it. Pick the date that sits at the end of eight to twelve weeks you can actually protect. A date that lands mid-block is a date you will sit underprepared.
2. It is not buried in your school calendar. Look at the two weeks before your candidate date. If they contain mock exams, a big project deadline, a performance or a sports final, your last two weeks of preparation are already spoken for.
3. It leaves room for a second sitting. Plan for two attempts from the start. Most students gain more between attempt one and two than from anything else they do, so the first date should have another date comfortably behind it and before your deadlines.
Working backwards from deadlines
Scores take a few weeks to be released and reach colleges. Build in that gap.
- Early action and early decision deadlines usually fall in the autumn of twelfth grade. Your last useful sitting is typically the one early that autumn, and that is tight.
- Regular decision gives you into the winter, but sitting your first test that late leaves no room for a second attempt.
- Scholarship deadlines are often earlier than admission deadlines and are the ones students miss. Check them before choosing.
Practical points that matter more than the month
- Register early enough to get a nearby center. An hour's drive before a three-hour exam is a real cost, and centers fill months ahead.
- Consider the day around it. A test the morning after a late event is a worse test.
- School-day testing. Some districts offer the SAT during a school day, which removes the registration and travel problem entirely. Ask your counselor whether yours does.
- Junior spring is crowded. AP exams, finals and the SAT often land within weeks of each other. Plan around that rather than discovering it.
The one genuine timing effect
Not difficulty, but content readiness. If the math on the test includes topics your school covers later in the year, a later date means you will have been taught more of it. That argues for spring over autumn for some students, and it is the only version of "this date is easier" that holds up.