diff --git a/.github/workflows/build-tarball.yml b/.github/workflows/build-tarball.yml
index 6811fa65b53251..402c909394d6ca 100644
--- a/.github/workflows/build-tarball.yml
+++ b/.github/workflows/build-tarball.yml
@@ -28,7 +28,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
   CLANG_VERSION: '19'
 
@@ -47,6 +47,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Environment Information
         run: npx envinfo
       - name: Make tarball
@@ -82,6 +83,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Set up sccache
         uses: Mozilla-Actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # v0.0.9
         with:
diff --git a/.github/workflows/coverage-linux-without-intl.yml b/.github/workflows/coverage-linux-without-intl.yml
index 312626cb1dddeb..8ab6cad156b27c 100644
--- a/.github/workflows/coverage-linux-without-intl.yml
+++ b/.github/workflows/coverage-linux-without-intl.yml
@@ -34,7 +34,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
   CLANG_VERSION: '19'
   CC: sccache clang-19
@@ -60,6 +60,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Set up sccache
         uses: Mozilla-Actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # v0.0.9
         with:
diff --git a/.github/workflows/coverage-linux.yml b/.github/workflows/coverage-linux.yml
index d44dfd2f3a8d80..8d9c7e27595df2 100644
--- a/.github/workflows/coverage-linux.yml
+++ b/.github/workflows/coverage-linux.yml
@@ -34,7 +34,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
   CLANG_VERSION: '19'
   CC: sccache clang-19
@@ -60,6 +60,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Set up sccache
         uses: Mozilla-Actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # v0.0.9
         with:
diff --git a/.github/workflows/coverage-windows.yml b/.github/workflows/coverage-windows.yml
index 81b4fc4001eebb..163f929c0ed0be 100644
--- a/.github/workflows/coverage-windows.yml
+++ b/.github/workflows/coverage-windows.yml
@@ -34,7 +34,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
 
 permissions:
@@ -52,6 +52,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Install deps
         run: choco install nasm
       - name: Environment Information
diff --git a/.github/workflows/daily-wpt-fyi.yml b/.github/workflows/daily-wpt-fyi.yml
index 64ab04bae7f0f3..c36f727cef6b84 100644
--- a/.github/workflows/daily-wpt-fyi.yml
+++ b/.github/workflows/daily-wpt-fyi.yml
@@ -13,7 +13,7 @@ on:
     - cron: 30 0 * * *
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
 
 permissions:
   contents: read
@@ -42,6 +42,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Environment Information
         run: npx envinfo
 
diff --git a/.github/workflows/lint-release-proposal.yml b/.github/workflows/lint-release-proposal.yml
index c3e0ee34d18188..bb3a3ac6778a54 100644
--- a/.github/workflows/lint-release-proposal.yml
+++ b/.github/workflows/lint-release-proposal.yml
@@ -10,7 +10,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   NODE_VERSION: lts/*
 
 permissions:
diff --git a/.github/workflows/linters.yml b/.github/workflows/linters.yml
index 9f7030b4ad0fbd..2e72dbf637f2b3 100644
--- a/.github/workflows/linters.yml
+++ b/.github/workflows/linters.yml
@@ -14,7 +14,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   NODE_VERSION: lts/*
 
 permissions:
@@ -47,6 +47,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Environment Information
         run: npx envinfo
       - name: Lint C/C++ files
@@ -67,6 +68,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Environment Information
         run: npx envinfo
       - name: Format C/C++ files
@@ -125,6 +127,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Environment Information
         run: npx envinfo
       - name: Lint Python
@@ -142,6 +145,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Environment Information
         run: npx envinfo
       - name: Lint YAML
diff --git a/.github/workflows/test-internet.yml b/.github/workflows/test-internet.yml
index a22d19562a34d4..7b3a84b2f1df94 100644
--- a/.github/workflows/test-internet.yml
+++ b/.github/workflows/test-internet.yml
@@ -31,7 +31,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
   CLANG_VERSION: '19'
   CC: sccache clang-19
@@ -57,6 +57,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Set up sccache
         uses: Mozilla-Actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # v0.0.9
         with:
diff --git a/.github/workflows/test-linux.yml b/.github/workflows/test-linux.yml
index f74e912ece0fb8..7fc1cb99768862 100644
--- a/.github/workflows/test-linux.yml
+++ b/.github/workflows/test-linux.yml
@@ -25,7 +25,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
   CLANG_VERSION: '19'
   CC: sccache clang-19
@@ -56,6 +56,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Set up sccache
         uses: Mozilla-Actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # v0.0.9
         with:
diff --git a/.github/workflows/test-macos.yml b/.github/workflows/test-macos.yml
index 72b1e8d3de8116..fe966161cb63e1 100644
--- a/.github/workflows/test-macos.yml
+++ b/.github/workflows/test-macos.yml
@@ -29,7 +29,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
   XCODE_VERSION: '16.4'
   FLAKY_TESTS: keep_retrying
 
@@ -55,6 +55,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - name: Set up Xcode ${{ env.XCODE_VERSION }}
         run: sudo xcode-select -s /Applications/Xcode_${{ env.XCODE_VERSION }}.app
       - name: Set up sccache
diff --git a/.github/workflows/tools.yml b/.github/workflows/tools.yml
index 2e8ffd22534691..41de4954ca6a14 100644
--- a/.github/workflows/tools.yml
+++ b/.github/workflows/tools.yml
@@ -43,7 +43,7 @@ on:
           - zstd
 
 env:
-  PYTHON_VERSION: '3.12'
+  PYTHON_VERSION: '3.14'
 
 permissions:
   contents: read
@@ -297,6 +297,7 @@ jobs:
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+          allow-prereleases: true
       - run: ${{ matrix.run }}
         if: github.event_name == 'schedule' || inputs.id == 'all' || inputs.id == matrix.id
         env:
diff --git a/android-configure b/android-configure
index 2558f52757e442..0467e7a90b79a4 100755
--- a/android-configure
+++ b/android-configure
@@ -4,6 +4,7 @@
 # Note that the mix of single and double quotes is intentional,
 # as is the fact that the ] goes on a new line.
 _=[ 'exec' '/bin/sh' '-c' '''
+command -v python3.14 >/dev/null && exec python3.14 "$0" "$@"
 command -v python3.13 >/dev/null && exec python3.13 "$0" "$@"
 command -v python3.12 >/dev/null && exec python3.12 "$0" "$@"
 command -v python3.11 >/dev/null && exec python3.11 "$0" "$@"
@@ -22,7 +23,7 @@ except ImportError:
   from distutils.spawn import find_executable as which
 
 print('Node.js android configure: Found Python {}.{}.{}...'.format(*sys.version_info))
-acceptable_pythons = ((3, 13), (3, 12), (3, 11), (3, 10), (3, 9))
+acceptable_pythons = ((3, 14), (3, 13), (3, 12), (3, 11), (3, 10), (3, 9))
 if sys.version_info[:2] in acceptable_pythons:
   import android_configure
 else:
diff --git a/configure b/configure
index 412f0b416e79c3..0d8f79ba9ab396 100755
--- a/configure
+++ b/configure
@@ -4,6 +4,7 @@
 # Note that the mix of single and double quotes is intentional,
 # as is the fact that the ] goes on a new line.
 _=[ 'exec' '/bin/sh' '-c' '''
+command -v python3.14 >/dev/null && exec python3.14 "$0" "$@"
 command -v python3.13 >/dev/null && exec python3.13 "$0" "$@"
 command -v python3.12 >/dev/null && exec python3.12 "$0" "$@"
 command -v python3.11 >/dev/null && exec python3.11 "$0" "$@"
@@ -22,7 +23,7 @@ except ImportError:
   from distutils.spawn import find_executable as which
 
 print('Node.js configure: Found Python {}.{}.{}...'.format(*sys.version_info))
-acceptable_pythons = ((3, 13), (3, 12), (3, 11), (3, 10), (3, 9))
+acceptable_pythons = ((3, 14), (3, 13), (3, 12), (3, 11), (3, 10), (3, 9))
 if sys.version_info[:2] in acceptable_pythons:
   import configure
 else: