World Time Buddy

What it does

Add the cities you care about and it draws them as parallel hour rows, colour-coded for working hours, so a meeting slot that suits London, Bangalore and San Francisco is something you can see rather than calculate. Dragging the time column updates every row at once, and it handles daylight-saving transitions correctly, which is where mental arithmetic fails. The output can be turned into a shareable link or a calendar event.

Best for

• Booking across three time zones
• Checking if it is a rude hour to call

Where it stops