Magento 2 CMS is generally involved worldwide stage for online stores. Magento 2 stores serve clients from different areas living in various time regions.
On the off chance that you are a business that proposals ready to come in case of emergency support, you might expect to realize the time region of your client's area. Or on the other hand, assuming you have carried out transportation limitations in light of the district, you might expect to know the region data of your client prior to tolerating their orders.
In such scenarios, you may add timezone & locale dropdown in custom form in frontend Magento 2 as shown below.
For more info, visit : https://meetanshi.com/blog/add-timezone-locale-dropdown-in-custom-form-in-frontend-in-magento-2/