On a sweeter note, this reminds me of what happened to my friend. She was first working on her birthday and then mentioned to two customers through light chatter, while they were ordering, that she had an exam she would rather be studying for and might have to stay up late. So at the end of her shift, her co-worker brought over a plate with a cupcake that had a candle in it and a letter. The couple she had talked to gave her 20 dollars and in the note said 'hopefully this cupcake will help you through the night'.