When to use it
Use it when you're starting a new role, working across time zones, or setting expectations with a team. Saying when you check messages and how to reach you for real emergencies prevents late-night messages and unmet expectations.
Example
New teammate: “What's the best way to reach you?”
You: “I check messages until 6. For anything urgent after that, please call.”
In an email or Slack message
Put it in your Slack status or email signature: “Online 9–6 ET. For urgent issues after hours, call.” It sets the expectation for everyone at once.