Convert a time between any two world time zones, handling DST.
The source time is first shifted to UTC by removing its offset, then shifted again by the destination offset. If the result crosses midnight, the day indicator shows whether it lands on the previous or next day.
UTC time = source time (minutes) − source UTC offset (minutes). Target time = UTC time + destination UTC offset (minutes). If target < 0, add 1440 (previous day); if target ≥ 1440, subtract 1440 (next day).
It uses fixed UTC offsets, so pick the offset that matches the date in question (for example PST vs PDT). It does not auto-adjust for DST transitions.
Offsets keep the tool fast and fully offline. Choose the offset label that matches your city's current standard or daylight time.