Is it impossible for me to vote in my state's 2018 elections?

[AGA]

I just found out that the New York deadline to register to vote for the 2018 primaries and general election is tomorrow. I will be 18 years old at the time of these elections. Apparently, however, I must also be at least 18 by the end of this year (December 31, 2017) to register, and I will still be 17 then. Does this mean that I can't vote in my state's 2018 elections or am I missing something here?

[AGA]

Wow. Why is it so damn hard to register to vote in America? Here you just... Go to the polls, and you vote.

On top of that, New York and many other states have closed primaries. The deadline to register for a party for the 2016 NY primaries was in October of 2015 even though the primary election was in April.

[AGA]

I just found out that the New York deadline to register to vote for the 2018 primaries and general election is tomorrow. I will be 18 years old at the time of these elections. Apparently, however, I must also be at least 18 by the end of this year (December 31, 2017) to register, and I will still be 17 then. Does this mean that I can't vote in my state's 2018 elections or am I missing something here?

It's the deadline for the 2017 election and the 2018 primaries.  2018 general election deadline isn't until next fall. 

Okay, thanks for the information.