Looks like they went to "partial shutdown".
The first thing I did after I saw it went into effect is looked up the Federal pay periods, because "800,000 Federal employees and their families will be starving over Christmas".
It appears the last pay period ended today (if I can still read the calendars correctly), so feds haven't even gotten their pay for the previous period yet. With a new pay period starting, there is already a two week buffer in which this thing will likely be over, so about a 90% chance employees will see no effect other than extra paid days off. The only ones getting "screwed" will be essential employees who have to work instead of getting paid vacation.
During the Obama shutdown, I went fishing and got paid for it. My next paycheck after the shutdown ended was like three days short, due to where the shutdown and the pay period aligned. The three days, IIRC, were added in a special electronic deposit a few days later.
It'll be interesting to see what is done with National Parks, etc. I think Trump kept them open earlier this year for that one day or whatever shutdown?