A not really hypothetical question based on these facts.
Both tired. Both work full time. Normally take it in turns to have a long lie at weekends.
DC in bed by 8pm.
DH has long lie on Saturday. I go to bed early (8.30pmish) Saturday night.Dh comes to bed several hours later.
On Sunday morning, when DCs wake up, I say "Your turn to get up". He says "but you had an early night".
So, does an early night equal a lie in?
Who is BU?