Should I take subject tests in May or June?

Hello, all!

I’m currently taking AP Chem & Pre-Calc Honors, so I’m also planning on taking the SAT Chemistry + SAT Mathematics II subject tests. However, I’m not sure whether I should take them in May or June - May, the material will definitely be fresh in my mind, but June provides a longer period of study.

Thank you!

June if you are sure you’ll study more after finishing. Plus AP tests are in May so having that many so crunched my make anyone tense. But if you are not certain you will really study in June then take it in May.

Same question but different situation, my son planning for SAT 2 Chemistry, Physics and Math2, he is taking AP Chemistry, IB physics HL (this year he is completing AP Physics syllabus and taking AP Physics test) and AP Calculus AB/BC. May SAT date is coming in between his AP tests, so if we register him for May his prep will be fresh but my QUESTION is AP prep is enough or he has to prepare more for SAT 2?

Thnaks