The best time to present a banner.

Commendation ceremony or celebration, anniversary or festival.

1. Commendation ceremony or celebration: Banners are used to commend outstanding individuals or teams, such as outstanding students of educational institutions, outstanding employees of enterprises and institutions, outstanding athletes of sports teams, etc. At the commendation ceremony or celebration, it is a decent and solemn way to present pennants, which can express recognition and encouragement to the winners.

2. anniversaries or festivals: such as the anniversary of the establishment of the company and the anniversary of employees' work. Giving a pennant can be used as a review of the past and a blessing for the future, and it is also an affirmation of employees' dedication.