--- description: Here are the most significant improvements in December. --- # December 2019 Update Olivier Tassinari. January 7, 2020. Here are the most significant improvements in December: - 🚨 We have introduced a new [Alert](https://material-ui.com/components/alert/) component in the lab, thanks to **[@dimitropoulos](https://github.com/dimitropoulos)** ([#18702](https://github.com/mui-org/material-ui/pull/18702)). The component also supports composition with a [Snackbar](/components/snackbars/#customized-snackbars). ![Alert](/static/blog/december-2019-update/alert.png)

Standard variant

![Alert](/static/blog/december-2019-update/alert-filled.png)

Filled variant

- 👤 We have added [stacking](/components/avatars/#grouped) support to the avatar. ![Stacking](/static/blog/december-2019-update/stacking.png) - ↕️ We have added [vertical](/components/buttons/#group-orientation) support to the button group. ![Vertical button](/static/blog/december-2019-update/vertical-buttons.png) - 🌎 We have almost doubled the number of supported [locales](/guides/localization/#localization) from 13 to 22, thanks to our awesome contributors. [Help us](https://github.com/mui-org/material-ui/blob/master/packages/material-ui/src/locale/index.js) double this number next month 🚀! But this summary is just scratching the surface. We have accepted 168 commits from 73 different contributors. We have changed 1,059 files with 13,468 additions and 8,584 deletions. ## Our roadmap intent for January *(We'll do our best, no guarantee!)* - 💄 We will keep working on a new [pagination](https://github.com/mui-org/material-ui/pull/19049) component. You can already [preview it](https://deploy-preview-19049--material-ui.netlify.app/components/pagination/) (lead by [**@mbrookes**](https://github.com/mbrookes)). ![Pagination](/static/blog/december-2019-update/pagination.png) - 📅 We will keep working on a major upgrade of the [date/time picker](https://github.com/mui-org/material-ui-pickers/issues/1293) components. We are working on desktop and range support (lead by [**@dmtrKovalenko**](https://github.com/dmtrKovalenko)). ![Date picker](/static/blog/december-2019-update/date-picker.png) - 🧮 We will keep working on a new [data grid](https://github.com/mui-org/material-ui/pull/18872) component. You can already [preview it](https://deploy-preview-18872--material-ui.netlify.app/components/data-grid/) (lead by [**@oliviertassinari**](https://github.com/oliviertassinari)). ![Data grid](/static/blog/december-2019-update/data-grid.png) ❓ Please upvote our [GitHub issues](https://github.com/mui-org/material-ui/issues) if you want something specific. The number of 👍 helps us to prioritize.