The number one sign that I've been on holidays is not that I'm less irritable. It's not that I no longer have dark bags under my eyes, or that I have actually some idea of what's going on in the news.
No. The number one sign that I've been on holidays is that I'm eating at a normal speed again.
Lunch period during a regular school day is far too short. Taking into account the time it takes to dismiss the kids, to do the photocopying that I forgot to do during my prep period, to track down my teaching partner to ask a couple of questions, and to set up for whatever I'm teaching after lunch, I have maybe 7 minutes to heat, eat, and clean up after my lunch.
And boy can I eat fast! Even piping hot food doesn't burn the roof of my mouth, it's into my stomach so quickly. I don't even need to brush my teeth afterwards. Who has time to chew?