The USS Winter Solstice (NCC-62133) was a Ambassador-class heavy cruiser on active duty in Starfleet during at least the last quarter of the 24th century. (Starfleet International: Vessel Registry, 0801.07 revision) Winter Solstice was deployed to the Starfleet Fourth Fleet beginning in the 2370s. (Starfleet International: USS Winter Solstice)