While the Contendings of Horus and Seth is my favourite Egyptian myth, bar none, the story of Nut and Geb always makes me a little sniffly.

For those who don't know it, the children of Shu and Tefenet, the first gods created by Amun-Ra, was Geb (the earth) and Nut (the sky). So in love were they that they clung together, allowing nothing to grow between them. In anger and jealousy, Amun-Ra demanded of Shu that he part them, so Shu stepped upon his son and raised his daughter in his arms, high high above her brother. No matter how they begged and pleaded, Shu did not relent.

Amun-Ra, still angry, then cursed Nut to never give birth on any of the 360 days of the year. Thoth, god of wisdom, took pity on her and challenged Amun-Ra to play for time. He won five days which he demanded added to the year, and in these five days Nut gave birth to Osiris, Horus the Elder (who's also Horus the Younger, but not really; welcome to Egyptian mythology!), Seth, Isis and Nephtys.