I'm looking for significant innovative knots. It's hard for me to quantify a year.
This makes it hard for people to respond to your question.
Knots have been known, invented and used probably since the moment humans created cordage made from vegetable fibre or animal sinew/tendons.
Early humans would have used some type of knot to tie bundles of sticks/wood together to transport from place to place.
At some point, humans would have figured out how to tie objects to the back of a horse or an Ox or a donkey, and then how to tie up a domestic dog (on a leash).
The bowline and figure 8 knots feel like they are old and have existed as long as sailing, so they don't feel innovative.
Hmmm, it seems there is a point in the historic time line where a knot is discarded on account of its 'age'?
Is the 'age' of a knot a factor in whether it is 'innovative'?
In terms of fulfilling the criteria of being 'innovative' - I would like to advance "tsik_lestat's" tri-axially loadable eye knot that is Tiable In the Bight (TIB).
This particular knot employs a toggle mechanism - which is 'innovative' in my view.
It is also 'new' in the sense that it was discovered 2019/2020 (ie it is not from ancient times).