Punctuality

[nelsonic]

A simple lesson that everyone can learn - and in the age of ubiquitous cheap digital watches and clocks on smartphones, nobody has the excuse to fail on - is punctuality.

Punctuality is the characteristic of being able to complete a required task or fulfill an obligation before or at a previously designated time. "Punctual" is often used synonymously with "on time"
https://en.wikipedia.org/wiki/Punctuality

If you say you're going to be somewhere at 11:00 and you arrive at 11:10; you're late.
If you have accepted a meeting invite for a 09:00 standup call and you don't attend (and fail to give prior warning), you are disrespecting everyone else's time.

Why? is this important?