The best time for military action in that region is February when the ground is frozen hard and it’s easiest for armor to move around. NATO knows this thus the urgency to get Russia to stand down.
My money is Russia attacks Ukraine before February 15.
Then there is the composition of both the U.S. and other NATO militaries. Women, both real and trannie, homosexuals, and the marginally fit will ensure a debacle for NATO. The Russians will rout them as surely as the sun rises in the east. Poland may see the handwriting on the wall and take some portion of Western Ukraine that was under Polish rule before 1945 and in the more distant past. Romania may come to an agreement with the Russians to annex Moldova in exchange for not supporting NATO moves. The Slovaks may attempt to take back eastern territories that were annexed by the USSR in 1945. In other words, NATO's eastern flank may crumble if the Russians move on Ukraine.