i haVE a date / time calculation in cell F5: =TEXT(C3+0.33333, "dd mmm yyyy hh:mm") and cell C3 has a formula: =IF(AND(H2>8,H2<16),F3,IF(AND(H2>16,H2<24),F4,F5)). it calculates correctly when the formula evaluates to F3 and F4 but returns a circular reference when it evaluates to F5. this is because C3 depends on F5. Before turning ON iteration is there a way i could reconstruct this to avoid circular reference issue? thanks