GitHub Actions: on:

https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#on

on: push
on: [push,fork]
on: pull_request 
on: schedule
on: workflow_dispatch # for manual trigger 
on: workflow_call     # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onworkflow_call

on: ['deployment'] (GitHub Actions helm deployments)

on:
  push:
    branches:
      - main
      - develop

on:
  schedule:
    # * is a special character in YAML so you have to quote this string
    - cron:  '30 5,17 * * *'

Related

• GitHub Actions: events that trigger workflows
• GitHub Actions: runs-on:
• GitHub Actions: inputs:
• GitHub Actions: schedule:
• Azure Pipelines: trigger
• when: (GitLab)
• Workflow does not exist or does not have a workflow_dispatch trigger in this branch.

See also

• on:, pull_request, workflow dispatch:
• GitHub Actions, act, .github/workflows/, ~/actions-runner/, svc.sh, deploy:, run:, runs-on:, uses:, steps:, jobs:, on:, env:, uses:, script:, continue-on-error:, template:, aws-actions, inputs:, GITHUB_ENV, needs:, github., GitHub runner, my-docker-publish.yml, GitHub Actions variables, GitHub Actions contexts, GitHub Actions Importer, If:, SLSA, Actions Runner Controller (ARC), $GITHUB OUTPUT, notify:, Marketplace, GITHUB_TOKEN, gh workflow

https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#pull_request

https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch