Years ago I missed a night international flight because of this. It left at 12:00 am (midnight) Nov.10, but to me that meant at the end of the day so I show up

Years ago I missed a night international flight because of this. It left at 12:00 am (midnight) Nov.10, but to me that meant at the end of the day so I show up 3 hours early at 9pm on Nov.10, only to find out the flight left 21 hours ago. I should have arrived 9pm Nov.9 to catch the plane at 12:00am which technically was the very start of Nov.10. I've noticed that they no longer post 12:00am as a flight time. Instead it would be listed a few minutes before, like 11:55pm Nov.9.