When do you celebrate her birthday, the 31st of Dec 2023 or the 1st Jan 2024? She completed 2 years by midnight 31st Dec, but she did not turn 2 until 1st Jan 2024, so she won’t be 2 years and 8 months until 1 Sept 2024 and is not eligible. Yes by a single day, but there has to be a cut off somewhere and those born the day before benefit, but those born the day after don’t. Between 100-200 other children in the country were born the same day as your daughter so you are not alone.