What timezone is used for scheduling times?
We use the timezone you have set your store to.
Please note that if you have scheduled a product and change the timezone before the scheduled time, the scheduled time will adjust to your timezone.
For example, if you have a product set to publish at 2PM GMT and then change your time zone to EST before the schedule has run, your product will instead publish at 2PM EST.
You can set your time zone in Shopify's settings as follows:
Go to "Settings" and then "General".
Scroll down to "Standards & formats" and here you can find a dropdown where you can select your time zone.