How do I create a countdown timer which is same for all users ?

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I am trying to create an auction app , where every 4-5 minutes a new product is shown to the users which they can either participate or reject from entering. So what I want to do is run a global counter every 4-5 minutes for all the users i.e all the users get the same counter timings.

What I have tried:

I have found no solution for it yet

Posted 11-Aug-21 9:19am

Deepesh Mhatre 2021

Updated 11-Aug-21 12:30pm

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Patrice T · Answer 1 · 2021-08-11T12:30:00

Quote:
How do I create a countdown timer which is same for all users ?

Said simply, you need a single time reference, server clock is a good candidate.
With server actual time and time of end of auction, you calculate a duration until end of auction, that duration is what you transmit to users.
Then locally you set a timer with that duration.
This way, every user will have same countdown, no matter its timezone.