Parsing 'daylight saving date' returns wrong date and time on Android.

🐛 Bug Report

Parsing ‘daylight saving date’ returns wrong date and time on Android.

If a run:

console.log(new Date(2019,1,17));

In the browsers, or in node js, it returns Sun Feb 17 2019 00:00:00 GMT-0300 (Brasilia Standard Time).

But, in React Native app it returns Sat Feb 16 2019 23:00:00 GMT-0300 (-03).

Note thats the timezone is correct GMT-0300, but the datetime returned is wrong.

The source problem here, is that the daylight saving date ended on February 17. So in ‘2019-02-17 00:00:00’ we had to go back an hour on the clock. Returning to ‘2019-01-16 23:00:00’.

To Reproduce

Setup the Android timezone to ‘America/Sao_Paulo GMT-03:00’ (-02:00 when in daylight saving date)

Run console.log(new Date(2019,1,17)) in a React Native app.

The output will be Sat Feb 16 2019 23:00:00 GMT-0300 (-03) or 2019-02-17T03:00:00.000Z.

Expected Behavior

The output should be Sun Feb 17 2019 00:00:00 GMT-0300 (Brasilia Standard Time).

Code Example

Strangely, using an Expo Snack the problem does not occur.

Snack: https://snack.expo.io/Bkj8saGIV

Environment

Tested with real devices with Android P, and with emulators API 16 and API 28.

  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: (4) x64 Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz
      Memory: 187.17 MB / 8.00 GB
      Shell: 3.0.0 - /usr/local/bin/fish
    Binaries:
      Node: 8.14.0 - /usr/local/bin/node
      Yarn: 1.13.0 - /usr/local/bin/yarn
      npm: 6.5.0 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3
      Android SDK:
        API Levels: 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28
        Build Tools: 23.0.1, 23.0.3, 24.0.3, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 26.0.3, 27.0.3, 28.0.0, 28.0.0, 28.0.1, 28.0.2, 28.0.3
        System Images: android-16 | Google APIs Intel x86 Atom, android-17 | Google APIs Intel x86 Atom, android-19 | Google APIs Intel x86 Atom, android-21 | Google APIs Intel x86 Atom, android-24 | Google Play Intel x86 Atom, android-28 | Google Play Intel x86 Atom
    IDEs:
      Android Studio: 3.2 AI-181.5540.7.32.5014246
      Xcode: 9.4.1/9F2000 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.6.3 => 16.6.3 
      react-native: 0.58.5 => 0.58.5 
    npmGlobalPackages:
      react-native-cli: 2.0.1

[andrewzey]

Upgrading to the jsc-android following the instructions @douglasjunior posted resolved my issue (running RN 0.58.3)

[douglasjunior]

Yes, I also managed to solve by following the jsc-android installation instructions.

Before I could not to solve due to some cache of Android Studio.