Please copy and paste XL2BB as mini sheet. It helps to understand the existing formulae and errors better.
Sorry, but I'm getting the spinning wheel of death and excel freezes when I to try to do the mini sheet, here is the formula in C1075:
=IF(D1075="Sun","",IF(COUNTIF(US_Holidays,A1075),"Holiday",IF(AND(COUNTIF(US_Holidays,A1076),D1076="Mon"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1076,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1076),D1076="Tue"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1076,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1076),D1076="Wed"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1076,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1076),D1076="Thu"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1076,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1076),D1076="Fri"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1076,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1076),D1076="Sat"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1076,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1077),D1077="Mon"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1077,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1077),D1077="Tue"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1077,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1077),D1077="Wed"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1077,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1077),D1077="Thu"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1077,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1077),D1077="Fri"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1077,CHAR(10)," ")," Holiday**"),IF(AND(COUNTIF(US_Holidays,A1077),D1077="Sat"),CONCAT(SUBSTITUTE(B1075,CHAR(10)," ")&CHAR(10)&"**"&SUBSTITUTE(B1077,CHAR(10)," ")," Holiday**"),B1075))))))))))))))