There’s not official marker on the annual calendar, but we think every family should treat themselves to at least one pyjama day per year. It begins (as all the best days do) with cartoons, and ends with everyone in the house wearing exactly what they wore when they woke up. You may decide to switch your boy’s nightwear depending on what it is you’ve been up to that day. If it was a movie marathon and a few board games then they’re probably fine in the same boys’ pyjamas. If it was cake making and den building, then maybe a change before bed is due.