Time Zone Converter
Convert a specific date and time from one time zone to another, with accurate DST handling.
Enter your values to calculate your result.
Formula
True UTC instant = entered wall-clock time, corrected by the source zone's real UTC offset at that date
Time zone offsets (including daylight saving time) change depending on the exact date, not just the zone itself. The entered date and time are resolved against the source time zone's actual offset on that date, then re-expressed using the target time zone's actual offset on that same instant — correctly handling daylight saving transitions in either zone.
Example
3:00 PM in Riyadh converts to 8:00 AM the same day in New York during U.S. daylight saving time, or 7:00 AM when daylight saving time isn't in effect.
Frequently Asked Questions
Does this account for daylight saving time?
Yes — the conversion is based on each time zone's actual UTC offset on the specific date entered, which automatically reflects daylight saving time where it applies.
What does the Day Offset mean?
Converting between time zones can shift the calendar day — for example, 11 PM in Tokyo is already the next afternoon in Los Angeles. A Day Offset of -1 means the converted time falls on the previous day; +1 means the next day.