Can we harvest sunflower seeds this year?

Another warmer than usual fall day, but it's not going to last.  Don't get the warm days like last week anymore.  Even at 22°C, the sun is going down and it feels rather cool.  I hope I'll be able to harvest seeds from my sunflower.  The other 2 are blooming nicely.

I think I'll be able to harvest soon.  I found several sites about harvesting the seeds.  This one looks good, as does this one.   I guess you can also dry the sunflower heads inside as this person did.