Starting November 1 GMT (which is 8pm on October 31 EDT) dozens of independent designers on Ravelry will be having a joint 25% off sale which goes through November 15 GMT (ending at 7pm EST).
You can find which designers are participating here. Some designers have selected specific patterns for the sale. All of my currently available patterns will be 25% off.
Once you've gotten your discounted pattern(s), head over to the GAL forum to join in the various knit-a-longs where there will be oodles of prizes! They run through December 31.
Happy holiday knitting!