Brad Clements writes:

However first-eventday is ALWAYS true, however when I print &dtml- eventday; the output value is always the same for each row, so first- eventday shouldn't be true on any row except the first.

Almost surely, the "in" tag does not call a callable object (because it does not expect, they could be callable). You, therefore, get the method itself. It is identical for all records. Dieter