While I was checking this TeamLiquid Site about season dates and more information, I noticed that there is, besides "Start Date" and "End Date", a so called "Season Lock".
What does the season lock do? Does it mean (being in relation to my last question about being demoted in starcraft 2 hots) that from the day a season is locked no demotion or promotion is possible anymore? (Not even if you e.g. lose every match from then on)
Thanks a lot for every answer.