Perhaps the bathroom is where one is most often has close encounters with plumbing problems. The toilet won't stop running, or maybe it overflowed. Maybe the sewer line itself backed up (we hope that none of you ever experience the horror).
March is the time for spring cleaning, although some people wait until the official beginning of spring in April. I like to get a head start on spring cleaning so that it does not creep up on me, so I start in mid-March.