[pickers][DatePicker] No support for Buddhist Era year section ('BBBB')

[jrock2004]

Steps to reproduce

Steps:

1. Codesandbox: https://codesandbox.io/p/sandbox/7vh5ff
2. Stackblitz: https://stackblitz.com/edit/vitejs-vite-kxq2xz2h

Current behavior

When you set the locale to be Thai what we are getting back is 14/มีนาคม/BBBB. If I alter the format to match DayJS docs to "BBBB BB" then the textfield just shows "BBBB BB"

Expected behavior

I would expect that BBBB would be set to 2568

Context

I am trying to support the Thai(Buddhist) locale formats for our users in that territory. I tested this in chrome 134

Your environment

npx @mui/envinfo

  System:
    OS: macOS 15.2
  Binaries:
    Node: 20.18.3 - ~/.volta/tools/image/node/20.18.3/bin/node
    npm: 10.8.2 - ~/.volta/tools/image/node/20.18.3/bin/npm
    pnpm: 9.12.3 - ~/.volta/bin/pnpm
  Browsers:
    Chrome: 134.0.6998.89
    Edge: Not Found
    Safari: 18.2
  npmPackages:
    @emotion/react: ^11.11.4 => 11.11.4
    @emotion/styled: ^11.11.5 => 11.11.5
    @mui/icons-material: ^6.4.5 => 6.4.5
    @mui/lab: ^6.0.0-beta.28 => 6.0.0-beta.28
    @mui/material: ^6.4.5 => 6.4.5
    @mui/material-nextjs: ^6.4.3 => 6.4.3
    @mui/system: ^6.4.3 => 6.4.3
    @mui/x-data-grid-pro: ^7.27.0 => 7.27.0
    @mui/x-date-pickers-pro: ^7.27.0 => 7.27.0
    @mui/x-license-pro: ^6.10.2 => 6.10.2
    @types/react: 18.3.1 => 18.3.1
    react: 18.3.1 => 18.3.1
    typescript: ^5.4.5 => 5.6.3

Order ID or Support key 💳 (optional)[/-]

Order ID: 106562

Search keywords: DatePicker Buddist Era Support

[michelengelen]

Hey @jrock2004 ... i can confirm this, but couldn't find a quick workaround or answer why this is not recognized as the year part of the date.

I'll add this to the board. 👍🏼

[jrock2004]

Hey @jrock2004 ... i can confirm this, but couldn't find a quick workaround or answer why this is not recognized as the year part of the date.

I'll add this to the board. 👍🏼

@michelengelen Also updated ticket with order ID as we do have a pro plan. Not sure if I have to create a new ticket to get priority but thought I would let you know