When You don't have to do journaling every day. The more you do, the more you'll benefit. It's up to you.
Late evening is a good time, just before retiring.
Some people prefer journaling early in the morning before they start their day. Block out at least fifteen minutes in any one session. Some activities take longer. The great thing about a journal is that you can use it practically anywhere. Setting It's best to have a quiet place where you can be alone with yourself and concentrate on journaling.