When should I apply to Harvard?

I don’t know whether this is the right forum to post this but I hope moderators will move it to the right one.

I’m a student from Ukraine and I’m 16. Currently I am in 11th grade which is the final year of secondary school here. I want to apply to Harvard but Harvard’s deadlines look a bit weird for me https://college.harvard.edu/admissions/apply/application-timeline . Here in Ukraine students should take ZNO in May/June (which is basically the same as SAT II) and then they can apply in July and in August they already know results. For exampe, this year application deadline was 24th July. However Harvard has completely different deadlines. Regular Decision deadline is January 1 and I just can’t understand why it is so. Should I like take all these SATs as soon as possible? Also doesn’t Harvard need my final grades, transcript ot whatever it is called in the US? I can only get it at the end of the year after taking exams.
Or maybe do I have to apply next year? I really don’t know what to do. Could someone please help me with all this? My basic queston is when should I actually apply?

Application to US colleges is made in your final year of secondary school. US students meeting a January 1 deadline for Harvard will be applying for Fall of that year. Admittance to a university is always conditional on both satisfactory performance and graduation up through exams.

You should apply when you’ve met Harvard (or any other school’s) requirements. SAT or ACT – have you taken either? Do you have plans to take either before Jan 1? If you can’t , then you should apply in late 2016.

Harvard is located in the USA and conforms its schedule to the American school schedule.

Most students apply and submit their transcripts of completed classes up to that date (for most, it is 3.5 years of high school coursework). Harvard will evaluate that. If, by time you apply, you have completed your high school, you’ll submit your most updated transcript and Harvard will review that.

Are you familiar with the sorts of students who are viable applicants to Harvard? Are you today, one of the top students your school has EVER produced? Will you achieve +1600 on your SAT? Why do you want to go to Harvard and why should Harvard accept you over the 32,000 other applicants?

Hey there! I am transfer sophomore in Harvard and I am also from Ukraine. One thing for sure: DO NOT wait one year. Your chances as an international transfer would be much lower. Feel free to pm me if you have any specific application questions!