what is messenger day and why should i care about it?the original premise of snapchat was to be able to send and receive photos and videos that disappear after a certain amount of time (around 10 seconds), and if the person you sent them to screenshotted 'em, you'd be alerted and thus able call them out on it. after a few months, snapchat expanded and introduced its story feature, meaning that users could upload their snapchat shenanigans to their public story for 24 hours before having them vanish.instagram soon followed suit and introduced instagram stories, giving users a multicolored circle around their icon to let others know that they've posted a new photo or video to their story. then, instagram took it one step further and introduced live stories, allowing users to livestream their adventures directly to their instagram audience.okay, so if you're thinking `well, i guess we have enough apps that do this temporary posting stuff…` – think again! because facebook messenger is jumping on the 24-hour post bandwagon with something it's calling messenger day.what is messenger day?it works literally like snapchat stories and instagram stories. after updating your messenger app, you'll be able to post your selfies with different face filters, stickers, and so much more. it's even kind of laid out like a solid hybrid of snapchat and instagram stories.how does it work...