=MOD(MOIS(""&$C1);2)
=NON(MOD(MOIS(""&$C1);2))
=SI(MOIS([@Date])<>MOIS(N(DECALER([@Date];-1;)));MAX(B$4:DECALER([@Parité];-1;))+1;N(DECALER([@Parité];-1;)))
=MOD($B5;2)
=NON(MOD($B5;2))
=MOD(SOMME(N(MOIS($C$5:$C5)<>SI(ESTNUM(DECALER($C$5:$C5;-1;));MOIS(DECALER($C$5:$C5;-1;)))));2)
=NON(MOD(SOMME(N(MOIS($C$5:$C5)<>SI(ESTNUM(DECALER($C$5:$C5;-1;));MOIS(DECALER($C$5:$C5;-1;)))));2))