https://www.pcgamer.com/sea-of-thieves-day-1-patch-is-a-fashion-accessory-not-a-download/

In the tradition of many games these days, Sea of Thieves has a Day 1 Patch. There's a twist, though: it's not something you download. The patch is an eyepatch with a red '1' on it, and you can buy it for your character for a single gold piece in any Sea of Thieves clothing store. See, it's a Day 1 Patch. Cute.

If you're not playing Sea of Thieves on its first day of release, no worries, matey. You can pick up the patch until March 29, which is 10 days, by my count.