Birthday

Birthdays are primarily a human celebration, commemorating the day of the year on which the human was born. Some Transformers also celebrate birthdays, though in their case it's more of a celebration of the day they were created.

Birthday celebrations generally involve a party of some kind with cake and presents.

Fiction

Generation 1 cartoon continuity

The Transformers cartoon

Astoria Carlton-Ritz had to throw herself a birthday party on a rooftop and invited people who worked at her company. Thrust, Dirge and Ramjet crashed the party in an attempt to kidnap her, but she was rescued by Powerglide. The Girl Who Loved Powerglide After having a surprise party thrown for him, Daniel Witwicky became obsessed with discovering when Ultra Magnus's birthday was, and roped Wheelie into helping him try to find out. Though they weren't successful, Spike Witwicky suggested nominating that particular day as Magnus's birthday. Surprise Party

The Autobots surprised Tommy Kennedy with a cake on his birthday. Season 5: Surprise Party

Japanese cartoon continuity

Super-God Masterforce cartoon

Lightfoot received a prototype car from his father for his seventeenth birthday. The car later turned out to be a transtector enabling Lightfoot to become a Godmaster. Lightfoot: A Dramatic Encounter

Victory cartoon

Frank was working at the uranium mine on his son's birthday when it was attacked by Decepticons. Infiltration... The Uranium Mine

Marvel Comics continuity

Grimlock considered August 23, 1986 his birthday. Grim Grams

Beast Wars cartoon

Rattrap wanted to see Dinobot and Cheetor scrap each other for his birthday. Gorilla Warfare

2001 Robots in Disguise cartoon

The evening before Kenneth Onishi's birthday, Koji Onishi made a wish on a shooting star to have his father back soon, safe and sound. Because he and his father went fishing whenever his father had a birthday, Koji set out the next day to buy him a fishing lure for when they'd reunite. On encountering Sky-Byte, Koji asked him to pass on the birthday present to Dr. Onishi, who'd been abducted by the Predacons. Coincidentally, Sky-Byte was in the process of transporting a pod containing the doctor and tried to keep cool. Nonetheless moved by Koji's explanation of what the fishing lure meant, he agreed to do as requested, but was stopped from doing so by the arrival of the Autobot Brothers. In the battle, the pod broke loose and Koji got his hands on it, found his father inside, and reunited with him. Koji Gets His Wish

Unicron Trilogy

Armada cartoon

Rad White claimed that High Wire was a birthday present from his grandmother. Base

Cybertron Cyber Key Code text

Thundercracker threw a surprise birthday party for Megatron as a practical joke. Unfortunately Megatron had just suffered a defeat at the hands of Optimus Prime and didn't appreciate the act. Thundercracker's Cyber Key Code text

Animated cartoon

Sparkplug was a birthday present to Sari Sumdac from her father. Sari's eighth birthday did not go well—as she didn't have friends her age, Isaac invited some of his employees' kids, but they weren't that keen on events. Sari was impressed with the new toy she got though, a musical robot named Soundwave. Sound and Fury

Live-action film continuity

Sector Seven alternate reality game

Sector Seven had footage of NBE 115 at a birthday party. SectorSeven.org

Transformers Classified

Douglas Porter threw a birthday party for his girlfriend Charlene Poole which turned out to be a downer when Douglas got into an argument with Kevin Bowman over the Mission City incident. Switching Gears

Rescue Bots cartoon

When Huxley Prescott was plummeting from the sky, Cody Burns discovered a nearby birthday party had a bouncy house as entertainment, which the rescue team were able to use to catch the falling reporter. Rules and Regulations Chief Burns bought himself a cake, unaware that the rest of his family were working on throwing him a surprise party. He and Chase had to be later rescued from a mine before the others could spring the surprise on him. Little White Lies