Multiplayer time countdown syncronisation

I’ve got a multiplayer project, I’m counting down from 1 minute to zero.
When server reaches 0 client still have 5 seconds left because of lag.
How to sync it properly?
Here is my code:

Why are you using variables for minutes, seconds etc? Just use “seconds” and format it in user widget (or wherever you want to display it) like 65 sec = 1m 05sec etc.
Set variable as **RepNotify **and trigger it only on the Server.