SPFL chief executive Neil Doncaster has warned there is "no further room" to reschedule games after the winter break was brought forward.
The 12 Premiership clubs will take their break starting from Boxing Day to coincide with the three weeks in which they'll be allowed just 500 fans in stadiums.
It means fixtures such as Celtic vs Rangers and Hibs vs Hearts will now be played in February, with the hope that supporters will be allowed in.
But with the situation around the Omicron variant unclear, the SPFL head has warned any further rearrangements won't be possible.
Doncaster told Sky Sports: "There is no further room.
"We've used the two available slots that exist. Although so many clubs wanted to postpone all three festive games, there simply isn't the space on the calendar to do that.
"We had two slots in January and the beginning of February, which we've used to put the 29 December and New Year games into, but there really isn't any further room.
"So 10 of the 12 cinch Premiership clubs wanted to postpone fixtures.
"I think that the two who didn't clearly expressed views that we already have a great deal of fixture congestion in the schedule, and by postponing the fixtures voluntarily, all we're doing is making that worse.
"From the league's point of view, all we want to do is to have as many games played as early as possible. So we understood that view.
"But ultimately, the clear majority of the cinch Premiership clubs wanted to postpone fixtures and that's where we got to.
"So I think it's been a bad week for Scottish football in terms of the restrictions, but a good week in terms of the democratic process and the league being able to respond to the views of its democratic clubs."
