Calendar hurled four innings on the hill, striking out seven body shop batters and walking just one to earn the win for the undefeated Elks (6-0).
Chandler Harmon came on in the fifth to finish the game with three straight strikeouts, spreading some extra icing on Calendar's birthday cake.
The Elks gave Calendar a three-run birthday present in their first at bat, starting with a base on balls to Aaron Hobbs and a bunt single by Jacob Graves.
A Plus starter Aaron Medley retired the next two Elks' batters before a walk to Bubba Houghton loaded the sacks full of antlers.
Medley beaned Harmon to score Hobbs before Kurt Taylor hit a hot shot to second that was missed and both runners came around to score on the A Plus blemish.
Calendar set down A Plus 1-2-3 in the first two innings and led off the top of the third with a base hit to left field.
Jacob Griffis walked before Elks' skipper Steve Hobbs sent Kevin Hagerdon in to run for Calendar at second base.
Hagerdon was quick back to the bench as he raced home on an RBI single to center by Houghton that gave the Elks a 3-0 lead.
Once again, the birthday boy was overpowering with another 1-2-3 inning.
Medley played a fine tune in the top of the fourth when he neatly worked his way out of a bases-loaded two out jam.
In the top of the fifth, the Elks' nightly stampede commenced as they sent Calendar's lucky number 16 batters to the plate and scored ten runs on nine hits, including two hits in the inning for both Harmon (3B,1B) and Graves (2 RBI singles).
Taylor Davis (1-1), Calendar (2-4), Houghton (2-3), and Hobbs (1-2) all contributed RBI base knocks in the inning.
Hagerdon had one hit and scored three runs in the ballgame for the Elks, who are moving closer each day in an attempt to defend their league title.
Medley was the only A-Plus player to reach base off Calendar with one base hit in the second inning and a base on balls in the fourth.