32 years ago today, Bruce Wayne donned the Batsuit for the first time and went out into the night to fulfil his self appointed duty of keeping the city safe.
It's a special occasion, and even though you and the past and current Robins know full well that he isn't keeping count, you still thought it'd be nice to surprise him with a cake that you all made together, with no help from Alfred.
The cake itself is probably inedible, but you all had a hand in making and decorating it with tiny bats, the Bat-Symbol and a Damien Wayne, the current Robin had (rather poorly) drawn a little Batman punching the Joker.
It had been Jason Todd, AKA Red Hood's job to keep Bruce distracted. Dick Grayson, or Nightwing as he calls himself now, had had the idea in the first place. Tim Drake, now Red Robin had done all the mixing and you'd made the icing. Barbara Gordon, otherwise known as Oracle was unable to attend the little anniversary party as it happened to fall on her family game night, but it was okay, since she wrote the card.
Everything was perfect, since you'd all begged Alfred to set up party decorations, and Jason should be bringing Bruce into the ballroom of Wayne Manor any moment now...
"Surprise! Happy 32nd Bat-Day!" You all exclaim happily, much to Bruce's surprise.