On 2 servers with real players, out of 16 Steam servers that run it now, fakes and empty ones included. Checked 05:36 UTC.
seek_winterday is a Hide and Seek map: one team hides, the other hunts. It is not one of the maps that come with the game, so servers send it to players from the Workshop when they join.
Over the last 30 days seek_winterday was the #175 map on CS2 community servers, with 26 real players on it at any moment on average - 0% of everyone playing. It ran on about 5 servers with real players at a time. Right now 9 people play it on 2 servers, most of them on servers in Russia. It is busiest on Tuesday around 17:00 UTC and quietest on Wednesday around 22:00 UTC.
Right now 9, on 2 servers from the Steam server list. Over the last 30 days it had 26 real players on average at any moment. Fake servers and bots are not counted, and Valve matchmaking is not in the list.
On Tuesday around 17:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: CS2 MANIAC #8 [RU] โ CYBERSHOKE.NET (CLASSIC) (8 players), โโ โ legacy.sx โ [!WS] ๐ MANIAC BHOP #1 (1 players), CS2 MANIAC #12 [RU] โ CYBERSHOKE.NET (CLASSIC) (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_mirage42,972 players on average
de_dust217,814 players on average
sandstone_fb14,338 players on average
de_mirage_fps6,284 players on average
awp_lego_25,401 players on average
awp_lego_2_fb4,796 players on average
de_mirage_christmas2,833 players on average
<null>1,273 players on average
bhop_emevaelx31,047 players on average
duels_mirage_1x11,015 players on average
de_inferno880 players on average
de_nuke751 players on average