Seeking two words

[Duane Campbell]

First, Most cultures have some kind of celebration of the solstice and
the equinox. They are well known. But most cultures also have somewhat
less important holidays at the mid-point between each -- Feb 1st or 2nd,
May 1st, August 1st (Lughnasa or Lammas, first fruits, for those of you
who don't celebrate that a whole lot) and Nov 1st. What are these called?
Cross-calender holidays comes to mind, but I don't think that is right.

Second, (and I may have asked this before, but got no replies) there is a
technical term for knuckle walking, as apes do. Anyone know what it is. I
have looked under all the appropriate and accessible Latin and Greek
words.

D