Variously known as purple or red deadnettle (Lamium purpureum). I don’t need to tell you that weeds can be beautiful.
It is prolific in the cool moist of early Spring. In mulched soil, it does not resist being uprooted, and leaves much of the soil intact. I let it linger on the margins of the beds, but, as I see it begin to produce seed, I may take it out if there’s time.
Some farmer friends of mine noted that its nectar produces an exceptional-tasting honey.