For Fathers' Day, until 18th June at 11:59p.m. Mountain Time, which I make to be 7:59a.m. BST on Modday 19th. You have go in through
https://go.newspapers.com/dads/? otherwise you get asked to pay. You need an account (an Ancestry one will do), but no payment details are taken if you register. You do
not need to click on the Free Trial link.
UK newspapers are included. Click on the Newspapers logo at top left to get to the full Search page. For options like Browsing selected newspapera, scroll down to nearly the end of the page.
As always with free periods, save anything you find locally, as it won't be free when the offer closes.