Better, faster, stronger time zone updates on Android

From the beginning, time zone rules were a component in Mainline, called Time Zone Data or tzdata module. This integration allowed us to react more quickly to government-mandated time zone changes than before. However until 2023 tzdata updates were still bundled with other Mainline changes, sometimes leading to testing complexities and slower deployment.

In 2023, we made further investments in Mainline’s infrastructure and decoupled the tzdata module from the other components. With this isolation, we gained the ability to respond rapidly to time zone legislation changes — often releasing updates to Android users outside of the established release cadence. Additionally, this change means time zone updates can reach a far greater number of Android devices, ensuring you as Android users always see the correct time.
↫ Almaz Mingaleev and Masha Khokhlova

This is equal parts boring and equal parts amazing. The amount of work developers have to put into making sure timezones work is astonishing, and the fact that a large chunk of it is done by volunteers is even more impressive.