v21 means Season 21, or Chapter 3: Season 3.Other numbers in the last digit such as a 5, 6, or 9 are test updates and are never released. The second number after the decimal point is usually a 0 but can be a 1 for either content updates or minor patches. The first number after the decimal point indicates the patch number of that season. The version number is currently formatted where the first digits indicate the Season, counting since Season 1. During Summer and Winter seasons, Epic Games staff take a holiday break, so there is usually a 4-week gap between major updates, but content updates can still happen. A week prior, the update is put in staging servers, where Epic Games privately test the update and fix any bugs prior to release. Content Updates and Hotfixes are released when there are no major updates. Major updates are usually released every two weeks, on a Tuesday. Unvaulted and/or Vaulted items, though they could contain a new Weapon/Item instead.They are Content Updates with less content, they contain:.

Could contain Unvaulted and/or Vaulted items.Released on the week between Major Updates, they don't require a download and don't have downtime.Could contain new Events (i.e Holiday events like Fortnitemares or normal events like Wild Weeks).New map changes (amount of map changes varies).Released every 2 weeks (except for when Epic Games is on vacation), they contain:.New mechanics (importance, impact and number of mechanics added varies).Released during the downtime after the end of a season, they contain:.Changes to various systems in the game (i.e Battle Pass rework from Chapter 2).Changes to preexisting mechanics and/or weapons.An overhaul of graphics and/or textures and overall style.Major new mechanics (i.e Reality Augments and Hurdling from Chapter 4).A new Map (i.e Apollo, the Chapter 2 map), replacing the previous one.Released during downtime after a Chapter Finale event (i.e The End), they contain:.Although it is unknown specifically what could come with a update, you can assume what type of content it will have and know how big it will be based on what kind of update it is:

Chapter 1 season 3