[Closed] pay & days off work

Anyone know what is the legal stuff on pay in relation to having the odd day of work for illness/stress and/or childcare duties? I recently had a day off had to look after my kid for the day in an emergency (wife was ill) - result was i lost a days pay. Seemed fair at the time but now i'm wondering if i should have lost wages for that day? Small co though, less than 10 employees. Anyone know?