Convert a time between IANA time zones.
Converts a time in one timezone to another using IANA timezone data, accounting for daylight saving.
Useful for scheduling calls or knowing what time it is where a colleague or family member lives.
Daylight saving transitions don't happen on the same date everywhere, so the offset between two cities can actually shift by an hour for a week or two each spring and fall depending on when each region springs forward or falls back.
14:30 in America/New_York = 19:30 in Europe/London (during BST — the offset differs when both are on standard or DST).
Yes — IANA timezone data includes historical and current DST rules per region.
British Summer Time (BST) is GMT + 1. GMT itself doesn't shift; the country switches zones seasonally.
Regions near the equator see little seasonal daylight variation, so shifting clocks offers little benefit — many such countries, along with a growing number of others reconsidering the practice, stay on standard time year-round.