I thought harvest moon was just the one that happened in october

Tonight is an eclipse. That is what you are talking about.

The last total eclipse I saw was about ten years ago. There are partial ones more often than that. A solar elipse is far more rare (the moon isn't as big to block the sun as the earth is the moon)

A diagram
        )        ->                &nb sp;     ->
SUN)&nbsp;&nbsp;-> &nbsp;&nbsp;&nbsp; <-(moon) &nbsp;&nbsp;&nbsp; HO NOES BLACKNESS &nbsp;&nbsp; (earth)
&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ->

That is a solar elipse.

&nbsp;&nbsp;&nbsp; &nbsp; ) &nbsp;&nbsp;&nbsp; ->&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;->
SUN ) &nbsp;&nbsp;-> &nbsp;&nbsp;&nbsp; <- (earth) &nbsp;&nbsp;&nbsp; HO NOES BLACK(moon)
&nbsp;&nbsp;&nbsp;&nbsp; ) &nbsp;&nbsp;&nbsp; ->&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;->

That is a lunar eclipse.