The rhythm tile is gone; the year of days stays

The 24-by-7 'when they play' tile under the battle-activity year came down. It was built to place battle-log reads where a player's expected battles crossed the log's batch; scored against a week of reads it did not place them (players sit down in hours the histogram rated ordinary), the session clock above does the job with one rule, and the year was always the part worth looking at. Nothing about the year changes: a day with battles is drawn with them, a watched empty day is zero, a day nobody was watching is hatched.