We'd like to offer a big thanks to the 15 contributors who made this release possible. Here are some highlights ✨:

• 🚀 New date time picking UI on DesktopDateTimePicker

  

• 🚀 Performance improvements

• 🐞 Bugfixes

• 📚 Documentation improvements

• 🌍 Improve Dutch (nl-NL) and French (fr-FR) locales on the data grid

• 🌍 Add Vietnamese (vi-VN) locale on the pickers

@mui/x-data-grid@v6.6.0 / @mui/x-data-grid-pro@v6.6.0 / @mui/x-data-grid-premium@v6.6.0

Changes

• [DataGrid] Support data attributes (#8845) @romgrk
• [DataGrid] Avoid allocations in hydrateRowsMeta (#9121) @romgrk
• [DataGrid] Fix filter input select accessibility (#9018) @Jul13nT
• [DataGrid] Fix accessibility issues in panels and toolbar buttons (#8862) @romgrk
• [DataGrid] Fix onCellEditStop not invoked (#8857) @romgrk
• [DataGridPro] Fix auto-scroll when reordering columns (#8856) @m4theushw
• [DataGridPro] Fix row ID type casting in detail panels lookup (#8976) @minchaej
• [DataGridPro] Emit columnWidthChange event on touchEnd of column resize (#8669) @MBilalShafi
• [DataGridPro] Do not apply filters on rowExpansionChange (#8671) @cherniavskii
• [DataGridPro] Prevent click event on sorting after a resize (#9117) @romgrk
• [DataGridPremium] Improve Excel export interface (#9128) @TiagoPortfolio
• [l10n] Improve Dutch (nl-NL) locale (#9043) @thedutchruben
• [l10n] Improve French (fr-FR) locale (#9109) @Jul13nT

@mui/x-date-pickers@v6.6.0 / @mui/x-date-pickers-pro@v6.6.0

Changes

• [fields] Allow to explicitly define the reference value and improve its default value (#9019) @flaviendelangle
• [l10n] Add Vietnamese (vi-VN) locale (#9099) @nhannt201
• [pickers] Add DigitalClock to DesktopDateTimePicker (#8946) @LukasTy
• [pickers] Add support for timezones on the adapters (#9068) @flaviendelangle
• [pickers] Fix MonthCalendar and YearCalendar disabled validation (#9149) @LukasTy
• [pickers] Fix bug when fields have a unique section (#9110) @alexfauquette
• [pickers] Fix focus jumping on Safari (#9072) @LukasTy
• [pickers] Use the locale start of the week in getWeekArray (#9176) @flaviendelangle

Docs

• [docs] Add single input range picker demo (#9159) @LukasTy
• [docs] Align DateCalendar demo views with labels (#9152) @LukasTy
• [docs] Clarify the peer dependency with React (#9067) @oliviertassinari
• [docs] Fix Norwegian locale typo (#9168) @LukasTy
• [docs] Fix column menu item demo (#9071) @MBilalShafi
• [docs] Improve localization table progress bars (#9033) @noraleonte
• [docs] Smooth performance animation (#8986) @oliviertassinari
• [docs] Use responsive time and date time pickers and the views sections (#9127) @flaviendelangle
• [docs] Reduce layout shift in grid demo (#9132) @oliviertassinari
• [docs] Fix tree data children lazy-loading demo (#8840) @yaredtsy
• [docs] Improve filtering docs discoverability (#9074) @MBilalShafi

Core

• [core] Allow string literals as keys in localesText (#9045) @MBilalShafi
• [core] Fix randomInt producing values exceeding max value (#9086) @cherniavskii
• [core] Fix flaky test on dateWithTimezone adapter test (#9129) @flaviendelangle
• [core] Lock @types/node on v18 (#9107) @LukasTy
• [core] Remove cross-fetch dependency (#9108) @LukasTy
• [core] Remove createDetectElementResize() replaced with ResizeObserver (#9015) @oliviertassinari
• [core] Upgrade monorepo (#9027) @m4theushw
• [core] Upgrade monorepo (#9106) @LukasTy
• [charts] Fix proptypes (#9125) @LukasTy
• [charts] Generate the charts proptypes (#9010) @alexfauquette
• [charts] Manage series stacking (#8888) @alexfauquette
• [license] List side effects in the license package (#9092) @cherniavskii