Question 1

Why do some cities' times change?

Accepted Answer

Some countries and regions observe Daylight Saving Time (DST), adjusting clocks during summer months. This tool automatically handles DST changes, always showing the current actual time.

Question 2

How is the time offset calculated?

Accepted Answer

The offset is the difference between the target city's UTC offset and your local timezone's UTC offset. For example, if local is UTC+8 and the target is UTC+0, the offset is -8 hours, meaning 8 hours behind local.

Question 3

Why can't I find a specific city?

Accepted Answer

This tool includes major cities and timezones worldwide but may not cover every city. Try searching by country name or the nearest major city.

Question 4

Where does the time data come from?

Accepted Answer

All time data is calculated from your browser's system clock and the IANA timezone database. No internet connection needed - everything is processed locally.

World Time Query - Porto

City Information