Depends on when you register your KF membership. If it's after 2005, you can attain gold status if you achieve 50k within your annual membership renewal month. If it's before 2005, your membership will renew on every 1 Apr, which means if you can hit 50k by 31 Mar within 1 year, you can get your gold status. If not, it'll be 50k within 1 year from the month you achieve your silver status.