Do you have a reservation? Your message did not make that clear.
If you have a reservation, read the instructions. You can telephone the Visitor Center and arrange to pick up the permit from their night pickup box.
If you don't have a reservation, their
online availability page shows there are still two dayhike permits available for this Saturday. All you do is call and make a reservation, which costs $15. Once you have that, you can call Friday before noon and arrange for a night pick up. ...So you can still go to work on Friday.
Sure wish Yosemite had a similar option. I broke a few laws trying to get to one of their permit offices before the 5 PM closing time last Thursday.