According to the publish notes, they move and change colour every two days, but since day one, this event has been buggy. They were finally found on day two at Brit Fields, then moved to no where anyone could find on day three and four. Day Five Xmas eve Johanne and Grimmomen both dropped in and left holiday wishes, at server up on Xmas day [day six]they were back in Brit Fields same colours but at least back. This is the first successful move after the two day stay, from the fields but the colours still haven't changed. I am glad they are available but the event is lacking any of the excitement the Japanese event saw.