User blog comment:Oreo the Cookie/Two weeks on the wiki/@comment-6697950-20171219115714

According to your contribution history, you made an edit on the 17th and the 19th, missing out on making an edit on the 18th. A skipped day resets progress on that badge. You have to make an edit each day without a break for it to count, though messages, blogs, file edits etc. also count for the badge, so it doesn't need to be an article edit.