@Genevere With the 90/180, after your 67 days in Greece plus the 23 other, you would only have to wait 91 days to reenter, the 90/180 are on a rolling basis so each day that passes drops one off the other end. You can be in 90, out 90, in 90, out 90 in a years time. We use the Shengen calculator that @Silversitters linked and it works great! We also build in a little more cushion so that I’m not in Shengen for more than 87-88 days. One delayed flight out could be a big problem.
Dan
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That is so exciting! Please feel free to share a photo on the forum when you welcome your new addition to the family. 
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