There is no official national nephew's and niece's week in the US. Nor is there a specific day in the year where niece's and nephew's are celebrated.
starts February 6th!
Nieces and nephews are the children of your siblings.
Nephews and/or Nieces
They are your nieces and nephews and not your cousins
Nieces are the daughters of your brothers and sisters. Nephews are the sons of your brothers and sisters.
They are your grand-nephews and grand-nieces or great-nephews and great-nieces.
Yes, he did have nieces and nephews. Three of his brothers and three of his sisters lived to maturity and together gave him more than 30 nieces and nephews.
Your borther-in-law's children are your nieces and nephews. You are their uncle or aunt, as is your spouse.
Nephews: Landon, Caleb, Nieces: Rylie, Sydney, Josie, Reagan
She has two nieces
Jane Austen never married and had no children.