diff --git a/.github/workflows/CI-cygwin.yml b/.github/workflows/CI-cygwin.yml
index 31557ecbcc7..b9ea30470da 100644
--- a/.github/workflows/CI-cygwin.yml
+++ b/.github/workflows/CI-cygwin.yml
@@ -4,7 +4,14 @@
 
 name: CI-cygwin
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/CI-mingw.yml b/.github/workflows/CI-mingw.yml
index 152e84902c2..cf64096f549 100644
--- a/.github/workflows/CI-mingw.yml
+++ b/.github/workflows/CI-mingw.yml
@@ -4,7 +4,14 @@
 
 name: CI-mingw
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/CI-unixish-docker.yml b/.github/workflows/CI-unixish-docker.yml
index 3558e6a5721..9bfc5a017b5 100644
--- a/.github/workflows/CI-unixish-docker.yml
+++ b/.github/workflows/CI-unixish-docker.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: CI-unixish-docker
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/CI-unixish.yml b/.github/workflows/CI-unixish.yml
index 856229f6dfe..44535cd077d 100644
--- a/.github/workflows/CI-unixish.yml
+++ b/.github/workflows/CI-unixish.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: CI-unixish
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/CI-windows.yml b/.github/workflows/CI-windows.yml
index 0b915571678..8589e43bb83 100644
--- a/.github/workflows/CI-windows.yml
+++ b/.github/workflows/CI-windows.yml
@@ -4,7 +4,14 @@
 
 name: CI-windows
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/asan.yml b/.github/workflows/asan.yml
index c29ecde8a4a..89dc81d7cfe 100644
--- a/.github/workflows/asan.yml
+++ b/.github/workflows/asan.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: address sanitizer
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/buildman.yml b/.github/workflows/buildman.yml
index 4bbdf779661..30cc5b16ad5 100644
--- a/.github/workflows/buildman.yml
+++ b/.github/workflows/buildman.yml
@@ -1,6 +1,13 @@
 name: Build manual
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/clang-tidy.yml b/.github/workflows/clang-tidy.yml
index 7bcd8bd8e31..3eda1954994 100644
--- a/.github/workflows/clang-tidy.yml
+++ b/.github/workflows/clang-tidy.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: clang-tidy
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 12d15855527..f486cf9e24f 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -1,6 +1,13 @@
 name: "CodeQL"
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index b07c15811cd..5018f2c3b8a 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: Coverage
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index ff3134b7ed5..3ae9ceb200f 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: format
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/scriptcheck.yml b/.github/workflows/scriptcheck.yml
index 6ef6d90ee4c..d6223caafa0 100644
--- a/.github/workflows/scriptcheck.yml
+++ b/.github/workflows/scriptcheck.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: scriptcheck
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/selfcheck.yml b/.github/workflows/selfcheck.yml
index 8cd028f9af9..70cc147c40f 100644
--- a/.github/workflows/selfcheck.yml
+++ b/.github/workflows/selfcheck.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: selfcheck
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/tsan.yml b/.github/workflows/tsan.yml
index 876e1976141..850453aa105 100644
--- a/.github/workflows/tsan.yml
+++ b/.github/workflows/tsan.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: thread sanitizer
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/ubsan.yml b/.github/workflows/ubsan.yml
index 2a422710b74..2fc169dcc23 100644
--- a/.github/workflows/ubsan.yml
+++ b/.github/workflows/ubsan.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: undefined behaviour sanitizers
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read
diff --git a/.github/workflows/valgrind.yml b/.github/workflows/valgrind.yml
index 1753e6f0acd..cf03ff89fa3 100644
--- a/.github/workflows/valgrind.yml
+++ b/.github/workflows/valgrind.yml
@@ -2,7 +2,14 @@
 # Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
 name: valgrind
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+    tags:
+      - '2.*'
+  pull_request:
 
 permissions:
   contents: read