Back in 2015 and 2016 Hilton ran a few status match offers where they were literally handing out Gold and Diamond status. As long as you had status with another chain hotel you were pretty much good to go, even if you earned the other hotels status due to one of their status matches or simply by having their credit card that comes with status, you were able to match.
In 2015, the status match would give you Gold or Diamond status through March 1, 2017. Then, in 2016 they offered the exact same match program, but instead of the status was valid through March 2018! Related post. So for those that took advantage of the second match, you’ll notice that your Hilton Diamond status will be around for another year and is not expiring within the next few months!
A few bloggers recently wrote about a potential glitch in the Hilton system where they were extending status another year. There is no such glitch or good will extension here, it all goes back to the status match from a year ago. If you are not 100% sure when your Hilton status is going to end, you can always use the chat feature on Hilton.com and inquire.