Time Zone Calculator
Search 70 cities, move any moment between two of them, watch both clocks tick side by side, and find the hours when your working days actually overlap. Daylight saving is taken from your browser's own time zone data, so the answer stays right all year.
How to use this tool
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1
Click a zone field and start typing — a city, a country, a zone name or even a UTC offset like +05:30 all find the right entry, with its current time shown next to it. Your own zone is detected automatically and sits on top; the round button swaps the two.
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2
On the first tab type the moment you care about — Use now fills in the current time. The second tab keeps both clocks ticking live, the third finds the hours your working days share.
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3
Copy Result puts the answer on your clipboard, and Share hands you a link that reopens the same two cities and the same moment for whoever you send it to.