NickRewind (formerly The '90s Are All That, The Splat and NickSplat) is a programming block that airs nightly on TeenNick. The block shows reruns of classic mid-late 1980s, 1990s, and early-mid 2000s children's programming, mostly shows that aired on Nickelodeon during their original runs. The block airs seven nights a week from 11 p.m. to 6 a.m. Mondays–Saturdays and 10 p.m. to 6 a.m. Sundays.
The block was preceded in the format by The '90s Are All That, which debuted the night of July 25, 2011 (early July 26) and was inspired by a large amount of interest in classic Nickelodeon series from the 1990s by users of social media outlets such as Facebook From October 7, 2011 through October 23, 2011, the block aired in an earlier time slot, from 10 p.m. to midnight. Response to the debut was very positive; hashtags pertaining to the block became trending topics on Twitter and the Nielsen Ratings for TeenNick on the debut night increased to between eight and 60 times the ratings TeenNick received in previous weeks, beating numerous higher-profile basic cable programs in the same time slot. The '90s Are All That was originally two hours in length, with most of that time airing from midnight to 2 a.m. Eastern Time.
Beginning October 5, 2015, the block expanded to eight hours encompassing the full overnight block (10 p.m. to 6 a.m.), and began airing a broader variety of series and rebranded as The Splat. To align itself with Nickelodeon's cross-platform branding, The Splat was renamed NickSplat on May 1, 2017. Nick took this another step further by renaming the block again as NickRewind on March 18, 2019.