When no one was looking, Michael put a box of donuts in the kitchen and then pretended that someone else brought them in to celebrate his birthday.
Kevin was told he might have skin cancer, but he was still waiting on a second opinion.
Depressed that no one cared about his birthday, Michael retreated to his office to stuff his face full of donuts and commiserate with Dwight - the only staffer to sign his birthday card.
At 11:23, Dwight announced that this was the exact moment of Michael's birth. Borrowing a Jewish custom, he sat Michael down in a chair and asked everyone in the office to help hoist him into the air.
To cheer up Kevin, Pam and Jim hit the store and bought him all of his favorite goodies. At the checkout line, Jim dared Pam to make a storewide announcement. Jim's eyes lit up when Pam actually went through with it.
After Michael blew out his birthday cake candles, he turned to see Meredith giving Kevin a hug and asked why no one had hugged him. Angela told Michael that no one cared about his birthday. Michael was more upset about the timing of Kevin's announcement than by the announcement itself.
Toby advised Kevin to get off the "terrible" Dunder-Mifflin health care plan. As they talked, Michael came by with good news: 99% of people with skin cancer fully recover, so there was no reason they couldn't have fun celebrating his birthday.
Michael announced that they were all going to take Kevin to a special place that was in no way related to his birthday. But when they arrived at an ice-skating rink, the first thing everyone saw was a huge banner proclaiming, "Happy Birthday, Michael!"
While most of the staff struggled to skate, Michael tore up the ice - he'd been skating since he was a kid. At the rink, Michael ran into Carole, the woman who sold him his condo. She was there with her two kids. Michael offered to take them "on a ride," and Carole watched with a big smile as he pulled the laughing kids around the ice with a hockey stick.
Kevin's second opinion finally came in and the results were negative. With that good news, everyone sat down to give Michael his birthday gifts and to have some cake together. "It was a good day," Pam said with a smile.