diff --git a/.github/workflows/compiler_playground.yml b/.github/workflows/compiler_playground.yml
index 7f2a75d324..eb48a9b210 100644
--- a/.github/workflows/compiler_playground.yml
+++ b/.github/workflows/compiler_playground.yml
@@ -5,9 +5,12 @@ on:
     branches: [main]
   pull_request:
     paths:
-      - "compiler/**"
+      - compiler/**
       - .github/workflows/compiler-playground.yml
 
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 defaults:
   run:
     working-directory: compiler
@@ -20,8 +23,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: compiler/yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/compiler_rust.yml b/.github/workflows/compiler_rust.yml
index cf911b9d47..3cda1325ca 100644
--- a/.github/workflows/compiler_rust.yml
+++ b/.github/workflows/compiler_rust.yml
@@ -18,6 +18,7 @@ on:
 env:
   CARGO_TERM_COLOR: always
   RUSTFLAGS: -Dwarnings
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
 
 defaults:
   run:
diff --git a/.github/workflows/compiler_typescript.yml b/.github/workflows/compiler_typescript.yml
index 233e963bfa..8576f66a10 100644
--- a/.github/workflows/compiler_typescript.yml
+++ b/.github/workflows/compiler_typescript.yml
@@ -5,9 +5,12 @@ on:
     branches: [main]
   pull_request:
     paths:
-      - "compiler/**"
+      - compiler/**
       - .github/workflows/compiler-typescript.yml
 
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 defaults:
   run:
     working-directory: compiler
@@ -31,8 +34,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: compiler/yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
@@ -50,8 +53,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: compiler/yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
@@ -74,8 +77,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: compiler/yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/devtools_check_repro.yml b/.github/workflows/devtools_check_repro.yml
index adaef6ac32..735371e3a8 100644
--- a/.github/workflows/devtools_check_repro.yml
+++ b/.github/workflows/devtools_check_repro.yml
@@ -5,6 +5,9 @@ on:
   issue_comment:
     types: [created, edited]
 
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 jobs:
   check-repro:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/runtime_commit_artifacts.yml b/.github/workflows/runtime_commit_artifacts.yml
index 2c32281634..c665f9b1bd 100644
--- a/.github/workflows/runtime_commit_artifacts.yml
+++ b/.github/workflows/runtime_commit_artifacts.yml
@@ -4,6 +4,9 @@ on:
   push:
     branches: [main, meta-www, meta-fbsource]
 
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 jobs:
   download_artifacts:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/runtime_fizz.yml b/.github/workflows/runtime_fizz.yml
index 43097728e3..97e4a0f7be 100644
--- a/.github/workflows/runtime_fizz.yml
+++ b/.github/workflows/runtime_fizz.yml
@@ -5,7 +5,10 @@ on:
     branches: [main]
   pull_request:
     paths-ignore:
-      - 'compiler/**'
+      - compiler/**
+
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
 
 jobs:
   check_generated_fizz_runtime:
@@ -15,8 +18,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/runtime_flags.yml b/.github/workflows/runtime_flags.yml
index baf9a48242..178d015bbf 100644
--- a/.github/workflows/runtime_flags.yml
+++ b/.github/workflows/runtime_flags.yml
@@ -5,7 +5,10 @@ on:
     branches: [main]
   pull_request:
     paths-ignore:
-      - 'compiler/**'
+      - compiler/**
+
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
 
 jobs:
   flags:
@@ -15,8 +18,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/runtime_flow.yml b/.github/workflows/runtime_flow.yml
index 6b8eb4b774..bba1faaf9f 100644
--- a/.github/workflows/runtime_flow.yml
+++ b/.github/workflows/runtime_flow.yml
@@ -5,7 +5,10 @@ on:
     branches: [main]
   pull_request:
     paths-ignore:
-      - 'compiler/**'
+      - compiler/**
+
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
 
 jobs:
   discover_flow_inline_configs:
@@ -34,8 +37,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/runtime_fuzz_tests.yml b/.github/workflows/runtime_fuzz_tests.yml
index 5b31d115dc..dac4dd095a 100644
--- a/.github/workflows/runtime_fuzz_tests.yml
+++ b/.github/workflows/runtime_fuzz_tests.yml
@@ -9,6 +9,10 @@ on:
     inputs:
       prerelease_commit_sha:
         required: false
+
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 jobs:
   test_fuzz:
     if: inputs.prerelease_commit_sha == ''
diff --git a/.github/workflows/runtime_test.yml b/.github/workflows/runtime_test.yml
index 90ead47361..84cfe79e5d 100644
--- a/.github/workflows/runtime_test.yml
+++ b/.github/workflows/runtime_test.yml
@@ -5,7 +5,10 @@ on:
     branches: [main]
   pull_request:
     paths-ignore:
-      - 'compiler/**'
+      - compiler/**
+
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
 
 jobs:
   test:
@@ -44,8 +47,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/shared_lint.yml b/.github/workflows/shared_lint.yml
index ca851ff232..e06637b168 100644
--- a/.github/workflows/shared_lint.yml
+++ b/.github/workflows/shared_lint.yml
@@ -5,6 +5,9 @@ on:
     branches: [main]
   pull_request:
 
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 jobs:
   prettier:
     name: Run prettier
@@ -13,8 +16,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
@@ -31,8 +34,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
@@ -49,8 +52,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
@@ -67,8 +70,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
-          cache: "yarn"
+          node-version: 18.20.1
+          cache: yarn
           cache-dependency-path: yarn.lock
       - name: Restore cached node_modules
         uses: actions/cache@v4
diff --git a/.github/workflows/shared_stale.yml b/.github/workflows/shared_stale.yml
index df9854c270..9135b9afca 100644
--- a/.github/workflows/shared_stale.yml
+++ b/.github/workflows/shared_stale.yml
@@ -5,6 +5,9 @@ on:
     # Run hourly
     - cron: '0 * * * *'
 
+env:
+  TZ: /usr/share/zoneinfo/America/Los_Angeles
+
 jobs:
   stale:
     runs-on: ubuntu-latest
diff --git a/.nvmrc b/.nvmrc
index 91f7588a1a..ef33d65101 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v18.20.0
+v18.20.1