Try the non array formula:

=IF(ISNA(MATCH(DATE($AM$10,Brad!$AM11,Brad!B$10),H olidays!$F$5:$F$12),0)),"",IF(MATCH(DATE($AM$10,Br ad!$AM11,Brad!B$10),Holidays!$F$5:$F$12),0),"H","" ))

--
HTH

Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings


with @tiscali.co.uk


"Brad" wrote in message
...
What I want to do is to mark a calendar with holiday's (by using an "H")
the
below equation works - is there a better way to do this?

I have the months starting in row 11 thru row 22 and the days of the month
starting in column b thru af. This array formula is in every cell of the
year as defined above.

{=IF(OR(DATE($AM$10,Brad!$AM11,Brad!B$10)=Holidays !$F$5:$F$12),"H","")}