Metric time - Wikipedia
en.wikipedia.org
At the post office we use 1/100th of an hour rather than minutes. So 0630 becomes 0650 at the post office.
I am sure no confusion has resulted from using a slightly different way of measuring time.
I was so proud of my modified semi-original MC themed meme that I didn't even realize it wasn't a dad joke.
I walked into a bar last night…. It hurt a lot!