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I'd like to get the timezone of the phone user so I can add or substract it to the UTC times I get from my API, and then make operations on them (for notifications, for example).
I only found how to add an offset with DatePickerIOS, but nothing else... Is it possible to get it from the front?
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Pretty much anything you could do in JavaScript on the browser (with exception, of course), you can do in React Native. I would initiate a new date object and call getTimezoneOffset() on it to get the number of minutes the timezone is offset locally.
var tz = moment. tz. guess(); It will return an IANA time zone identifier, such as America/Los_Angeles for the US Pacific time zone.
I found it is better to get the actual timezone ID (such as America/New_York) and then set your server program to work using that timezone at the beginning. To get that, use the react-native-device-info library: https://www.npmjs.com/package/react-native-device-info
import DeviceInfo from 'react-native-device-info'; console.log(DeviceInfo.getTimezone()); // 'America/New_York' If you get an error about 'tvOS' during compilation, see this fix: https://github.com/rebeccahughes/react-native-device-info/issues/286
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