"As of 4:47 PST / 11:47 UTC the errors "

From Wikipedia: "The Pacific Time Zone (PT) is a time zone encompassing the western United States and northwestern Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time (UTC−08:00). During daylight saving time, a time offset of UTC−07:00 is used instead."

When did this confusion become so prevalent?