so.. theese coin sales

so im done with all the "normal" content, and starting to progress through veteran and expert, and i kinda wanna buy coins to speed up the progress (more daily vet/exp + daily training + teammodes) and i figured im probadly gonna get vip 5 at some point anyway bc, thats usually how i get about f2p models..
so i read a bit about theese 30%+ coins on rare occations, and i figured if im gonna buy 2500 or somthing coins, 30% more is kinda a big deal, tho i dont wanna wait month for a sale neither

does any1 know is any sale is planned for some special holiday cming up (haloween for an example), or in case not, how far ahead they announce theese
