As Fernando said, the halberd doesn't look like a fighting weapon. I had the chance to handle some original halberds, and even though I've seen some weird shapes (including crescent like blades), they never looked like this.
In my humble opinion, the blade and rear spike are too thick and almost look like they were cast (not sure about that though), plus they are not usually mounted to the rest of the weapon in this way. Moreover the weld of the socket is usually cleaner, and reinforced with langets.
So maybe a ceremonial or ornemental weapon from the XVIIIth / XIXth century ?
The second is very nice and old (you can see the structure of the steel in one of the pictures). Although it's hard to tell due to the condition, I think it might be an "épieu" (no idea how to translate that in english "hunting spear" ? Although war "épieux" existed too). The faceted socket looks almost XVth century like to me ...