That could be the case, but I think the emphasis is more on the idea that you have the same “birthdate” to be considered a giving sibling.
Like on February 15 you and a friend took the Giving Pledge together and then that date was the same day you became siblings. Then you celebrate that day every year or form a bond around this shared experience.
does giving sibling mean giving somethin g to each other?
That could be the case, but I think the emphasis is more on the idea that you have the same “birthdate” to be considered a giving sibling.
Like on February 15 you and a friend took the Giving Pledge together and then that date was the same day you became siblings. Then you celebrate that day every year or form a bond around this shared experience.