CD Projekt Red has announced that the current Ranked Play season will end on Wednesday, February 7th at 1 pm CET. The new patch that is currently on the PTR will be released the following day (with additional balance tweaks not currently on the PTR)!
Quote from @PlayGwent
Current Ranked Play season will end on February 7th at 1 PM CET which means you have 5 more days to rank up!
End of the season rewards will be distributed the next day (February 8th), together with the balance patch and start of a new season.