Time Zone Converter & Meeting Planner
Convert a reference time across world cities with DST and UTC offsets, then scrub a 24-hour slider to find overlapping working hours.
How the Time Zone Converter & Meeting Planner works
Conversions use the IANA time zone database built into your browser, so daylight-saving transitions and historical offset changes are applied automatically for the exact date you choose.
The meeting planner colours each hour by local working time across every selected city, so you can scrub the slider to find a slot that falls inside business hours for everyone.
Formulas used
- Conversion
local time = UTC + zone offset (including DST)
How to use the Time Zone Converter & Meeting Planner in 3 steps
Step 1
Set the reference date and time and choose its source time zone.
Step 2
Add the cities or IANA zones you want to compare.
Step 3
Drag the 24-hour slider in the meeting planner to find overlapping working hours.
Frequently asked questions
Does the converter handle daylight saving time?
Yes. Offsets are resolved for the specific date you enter, so a meeting in July shows summer time and one in January shows standard time for each city.
What is the best meeting time for New York and London?
Typically 9:00–12:00 in New York, which is 14:00–17:00 in London, but add both cities to the planner to confirm the overlap for your date because their DST changes fall on different weekends.