A live countdown to someone's birthday that you can share as a link. Pick the date, the time it starts, and their timezone. Nothing is stored and nobody needs an account.
The countdown tells them the moment is coming. The interactive birthday card is what arrives when it does. A card can have its own countdown built in: set the event date and timezone when you create it and the card stays locked, showing a timer, until midnight their time, then reveals a 3D cake they blow out using their phone. Use this page for the shared, public countdown and the card for the personal one. Cards for an anniversary or any other occasion can have the same countdown built in.
Nowhere. The date, time, timezone and name are encoded in the link itself, so anyone who opens the link sees the same countdown and nothing is saved on a server. Keep the link and the countdown keeps working.
Set the timezone to theirs. The countdown ends at midnight, or the time you choose, where they are. Everyone who opens the link sees the remaining time correctly from wherever they are.
Yes. Leave the name blank and it counts down to whatever date and time you enter: a wedding, a flight home, the end of exams. The page is built for birthdays, but the timer does not mind.
No. The link opens in any browser on any phone or computer. There is nothing to install and no sign-up for either of you.