=SUMPRODUCT(--(A1:A1039082),--(A1:A10<39114),--(T1:T10))

extend this if you have moe or less than 10 rows.
--
Gary's Student
gsnu200707


"judgejulz" wrote:

What formula can I use to get the sum of cells in 1 column, but only if that
cell corresponds to a date in January. For example, column A is the date
column and every cell has a different date in it and I want to get the sum of
all the entries in column T in January or February etc.