How this calculator helps
What the calculator is for
The time zone calculator quickly compares the current time between two places or time zones. It helps with work calls, travel, online meetings and communication with people in other parts of the world.
How the calculation works
The calculation uses browser-supported time zones and the current date. It usually accounts for standard daylight-saving differences and shows local time in both places, the time difference and a simple jet lag indicator.
Practical example
Example: enter Prague as the source and New York as the destination. The calculator shows the current time in both cities, the hour difference and whether the destination is on the same, previous or next calendar day.
What to watch out for
Some regions change daylight-saving rules, and historical or future changes may differ. For important flights, meetings or deadlines, verify the time in a calendar invite or with the organizer.
FAQ
Can the calculator use cities and time zones?
Yes. You can enter common city names or specific zones such as Europe/Prague.
Does it account for daylight saving time?
It uses browser time zone data, so current differences usually include daylight-saving adjustments.
What is the jet lag index?
It is an indicative text estimate of how demanding the time shift may be.
Can I use it for meeting planning?
Yes for orientation, but important times should also be checked in the calendar invitation.