Can you give us more context about what you're meaning here, so that we can figure out your best next steps?
For example, are you attempting to update the timezone for your store within the Settings > Store details > Time zone and units of measurement section within your Shopify admin, as seen below?
If I've misunderstood your question, do let me know. It'll help us a lot if you can also include a screenshot of what you're referring to in your reply, so that we can quickly assess the situation and proceed with providing you with the most appropriate guidance.
Looking forward to your reply.
Kimi | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog