Remote teams split between California and New York deal with this conversion daily. Engineering companies, media firms, and financial services with offices on both coasts rely on a clear understanding of the Pacific-to-Eastern gap.
The standard difference is 3 hours. When it is 9 AM in Los Angeles, it is noon in New York. Morning standups scheduled at 10 AM Pacific land at 1 PM Eastern, right after lunch on the East Coast.
Both zones observe Daylight Saving Time on the same schedule, so the 3-hour gap stays constant year-round. PST (UTC−8) becomes PDT (UTC−7) in spring, and EST (UTC−5) becomes EDT (UTC−4) at the same time.