sorry, no event, or booked time can start on anything but a round number. At minimum it must start on a 5, on a 10 is preferred, and on the hour or half hour best.
"Ok, it's 2:26, I'm gonna get off Lemmy at 2:30 and do laundry..."
Edit: "Oops, it's 2:49, and I'm still on Lemmy. I'll get off at 3."
Edit #2: "Shit, lost track of time, it's 3:09. Now I have to wait till 3:30, dammit."
Edit #3: "Fuck, how is it 3:40?! OK, I'll compromise and stop at 3:45. I can do this."
Edit #4: "Ok, ok, breeeeathe. It's 4:04. You know what, this has been really stressful. I need to stay on Lemmy till 5 for my mental health. Then I'll definitely do laundry!"
I usually say "I'll do laundry at 3" and set an alarm for 3 called "do laundry". Of course, sometimes I hit snooze on that alarm, but then Google nags me 15 minutes later to do laundry. It usually works.