https://arstechnica.com/gadgets/2019/03/windows-10-builds-coming-thick-and-fast-as-1903-nears-completion/

It's clear that Microsoft is in the very final stages of development of Windows 10 version 1903, the April 2019 Update. The fast distribution ring has seen two builds arrive this week after two last week, bringing with them no new features but a slowly whittled-down bug list following the development pattern we've seen in previous updates. In the past, the company has tried to release Windows 10 feature upgrades on Patch Tuesday, the second Tuesday of each month, meaning there's just under three weeks left to go.