Probably you can work out the meaning from the hashtag itself, but why two of them? What’s the difference between Throwback Thursday and Flashback Friday?

Overall Findings

Judging by the Google Trends data, #FlashbackFriday is has been around longer than #ThrowbackThursday. Still, the latter appears to be more popular today. Both trends took off in 2013. Throwback Thursday may be more popular because it’s a more active time for social media in general. The definitions of throwback and flashback may differ slightly, but the point is the alliteration. Both hashtags are used to reflect on memories, movies, songs, shows, products, events, or trends from the past. Content shared for each hashtag is almost indistinguishable.

Users Treat Content on Throwback Thursday and Flashback Friday the Same

Generally speaking, use #ThrowbackThursday or #TBT when you post on a Thursday, and #FlashbackFriday or #FBF when you post on a Friday. Flashback Friday may be helpful for people who forgot to post something on a Thursday. Then again, there are no rules for what you can attach a hashtag to. So, there’s no difference between Throwback Thursday and Flashback Friday. There’s no codified timeframe or subject matter for posting because there are no curators for content other than the mass of people who engage with it. You don’t even have to post on a Thursday or Friday. Sometimes you’ll find users ​posting photos or videos with no nostalgic quality or making their #ThrowbackThursday posts on a Sunday.