The Facebook-owned photo- and video-sharing network said the dates were chosen due to their proximity to its founding date—Oct. 6, 2010—adding in its blog post:
This Worldwide InstaMeet falls just before the Instagram community’s birthday Oct. 6. To celebrate the vibrant, diverse and global community that has grown since Instagram launched just five short years ago, the theme of #WWIM12 will be to share #todayimet portraits of the people you meet. To help others connect to new and interesting people, ask the subject of your portrait about their favorite Instagram accounts, and include them in your caption with the #whoifollow hashtag.
Instagram users: Have you ever participated in an InstaMeet, local or worldwide?