HelloGames:
Omega: Introducing Update 4.5
The OMEGA update invites everybody to embark upon a new shared interstellar expedition entirely for free, whether they already own No Mans Sky or not. Featuring a complete overhaul of expeditions, new on-planet missions, claimable pirate freighters, and much more!
From 14:00 GMT, Thursday 15th Feb to 18:00 GMT, Monday 19th Feb, the entire Omega expedition will be open to everyone, entirely for free, even if you dont own No Mans Sky!
This is the best time for players old and new to come together and explore the universe.
Source: N4G PC Omega Update – No Man's Sky