Not only did the first of his two goals against St Mirren on Sunday take him through the 50-mark for the club he joined in January, 2011, they came on his 100th appearance in domestic competition for the Hoops.
And, to boot, Commons got the goals in the 4-0 thumping on his daughter, April's, fourth birthday.
The man from Mansfield is now preparing for a well-earned rest, and reflected on reaching his scoring milestone.
He said: "Hopefully, there will be another 50."
Commons declared his intention to add to his impressive goals tally for the campaign with a clever chip in the first half which rebounded off a post.
"It would have been nice if the chip had gone in for my 50th, but I'll take the two-yard header," he smiled.
A rocket into the roof of the net, following good lead-up play by James Forrest, gave Commons his brace.
But, he could have put the icing on the cake with a very unusual finish, as he explained: "The ball was breaking to me and I had a shot with my right foot.
"That could easily have gone in as well and I could have had a hat-trick."
It was a margin of victory which, after three 1-0 wins, manager Neil Lennon felt was coming.
And Commons told the club's website: "It's good that, once we score, we very often go on and win the game.
"It gives us a freedom to express ourselves and get more goals."