Nothing good is sent at 11.40pm.
Most of the messages people regret are sent late, tired and angry. Quiet hours let you set the times when messages wait, so the exchange happens in the morning, with the facts and without the heat.

You will recognise these
A message at 11pm feels urgent even when it is about next Thursday. Then two people are awake and angry.
Every buzz is a pull back into the conflict, whatever time it is.
Telling your co-parent not to message at night starts another argument. A setting does it quietly.
How quiet hours work
Check a message before the morning
If you are drafting something late, paste it here first. The checker will show you how it is likely to land.
Your message is sent securely to OpenAI to produce this result and is not stored by us. We never share it, and we only record that a check happened, not what it said.
Guides on this topic
Send it to your co-parent or to someone who needs it.
Quiet hours, Tone Guard and one shared calendar
Free to download. Set up your shared space with your co-parent in a few minutes.
Download on the App StorePrivate and encrypted. No social feed, no public profile.