Daylight saving time changes in Brazil 巴西更新时区数据

On October 21, we started hearing complaints from users in Brazil with devices running Android 8.1 or lower that the clock on their Android phones automatically changed to Daylight Saving Time (DST). This occurs because some devices are using an outdated version of the Time Zone Database that does not include the recent DST change in Brazil.

10月21日，我们开始听到巴西用户对Android 8.1或更低版本的设备的投诉，他们的Android手机上的时钟自动更改为夏令时（DST）。发生这种情况是因为某些设备使用的是时区数据库的过时版本，该版本不包含巴西最近的DST更改。

To address this issue, we strongly recommend that you update the Time Zone Database (tzdb) using IANA 2018a/b/c version using the following AOSP changes in Android 8.1 AOSP.

• Update Android to tzdata 2018a/b/c

• ICU changes for 2018a/b/c

Newer updates are available, using versions 2018d and 2018e.

For 2018d, use:

• Remove test that depends on tz data

• Update ICU data to 2018d

• Upgrade time zone rules to 2018d

For 2018e, use:

• Update Android to tzdata 2018e

• Update ICU to tzdata 2018e

The Android 8.1 release branch was cut with tzdb 2017c and is therefore affected by the Brazil DST change this year. The Android 9 release branch was cut with tzdb 2018e and is not affected.

For devices running Android 8.1 or higher, you also have the option of using a feature that allows you to update time zone data via the Play Store update. This feature makes future changes to tzdb easier, without requiring a system update and allows users to receive timely updates, extending the useful lifetime of Android devices. For more information, see AOSP Timezone Rules.

对于运行Android 8.1或更高版本的设备，您还可以选择使用允许您通过Play商店更新更新时区数据的功能。此功能使未来对tzdb的更改更容易，无需系统更新，并允许用户及时接收更新，从而延长Android设备的使用寿命。有关更多信息，请参阅AOSP时区规则。