2390s

This period was apparently what one might describe as a wave of 2360s nostalgia, because this uniform update feels very much evocative of that period, albeit with some small design tweaks. The grey undershirt is now a solid black, while the colored division shoulder pads—featuring a subtle hexagonal design for texture—now extend to include a collar over it, and rank pips displayed on the chest rather than the neck.
https://gizmodo.com/star-trek-picards-best-callbacks-to-the-next-generatio-1842566037