I wouldn't give up hope yet. Hatch day is normally on day 17 (depending on if you count the day you set as 0 or 1). If the temp was a bit low, it will take a bit longer. If you're worried, you might candle and egg or two.
I have celadons starting to hatch today myself. One out so far.
I have celadons starting to hatch today myself. One out so far.