Showing up late
While everyone gets stuck in traffic or takes longer leaving the house than they initially intended from time to time, being frequently late – especially if you don’t tell the person you’re meeting that you won’t be on time – is an undeniable etiquette mistake.
“Showing up late tells others that your time is more valuable than theirs,” says Tsai. If you are running late, it’s important to inform anyone who may be waiting for you, and to thank them for their patience upon arrival.
