Monday. If you spend money on a Monday you will spend it for the week. If you set oats on a Monday it will be a bad crop. If visitors come on a Monday you will have visitors for the week. If you go visiting on a Monday you will have bad luck for the week. If you build a fence on a Monday it will fall down again. If you go in service on a Monday you will not stay long in your job. For health.Anaithnid