Before making a thread regarding Stamina Bonus, please read this thread and see if it answers your question.

The 6:00am and 6:00pm stamina bonuses are not part of your stamina bar, meaning it will not add your status bar.
They are part of the muscle icon found under your stamina bar,once that turns
YELLOW you'll be consuming that stamina, and not yours.Once that icon is gone, then you'll begin to use your regular stamina.

If this didn't answered your question, then go ahead and make a thread

Take care,