Yeast is already a living organism, so technically speaking, you didn't give your sourdough starter "life.".But after days of nurturing a starter, it certainly can feel that way.So when your starter has a year or two under its belt, is it wrong to throw it a birthday party?.A bakery in England sure doesn't think so.On Friday, Hobbs House Bakery published a celebratory Instagram post for its sourdough starter's 65th birthday.It featured a birthday card, party hats, and even two cupcakes—one with a six candle and one with a five.The starter was brought to England from Germany in 1955 and gifted to a baker at Hobbs House.Though 65 years is certainly impressive, it's far from the oldest starter on record.San Francisco's Boudin Bakery claims it's been using the same sourdough starter since they opened in 1849