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This is the article of an example of how to fix timezone issue with playSMS.

This is my server’s time, its in UTC:

And then I check where is my php.ini, both for php-cli and php-fpm (I’m using Nginx with php-fpm):

I looked for date.timezone option on php.ini, edit it and set the option to my timezone Asia/Jakarta, its UTC+7. When done it will be like this:

I also set it in php-fpm php.ini, not just php-cli php.ini:

Please note you need to restart php-fpm when you changed php-fpm php.ini.

In playSMS I set my default timezone to +0700 (its UTC+7):

Restart playsmsd and do some test, for example send an SMS with a schedule. Imobie phonerescue torrent.

As a reference please read this:
https://playsms.org/2013/12/07/fix-timezone-problem/