Anyone who has visited England, Australia, or Japan will tell you that no matter how many times they remind themselves to look right before stepping off a curb, invariably they forget and come home with tales of nearly being flattened by crazed foreign drivers. As a planet, let's choose which side of the road we will drive on and stick with it. 6 PM would be 1800 hours. This won't happen anymore. And let's scrap daylight savings time altogether.
Farmers ignore it.
Cows ignore it. So should we. Let's make that standard world-wide. Wailing sirens in this country alert you to an approaching police car or fire engine. A better idea would be to digitally sample a screaming female voice, then program it into all emergency vehicles around the globe.