Used to express the moment or the occasion of an action; 'at the time of', 'upon', 'when'.
Long explanation:
The ~に際して grammar point describes an action that occurs during a specific event, occasion, or when something takes place. It can be translated into English as 'at the time of', 'upon', 'when', or 'in the event of'. This grammar is used with nouns to describe the context or situation during which an action takes place.