Italicize the phrase before the date

Warning²Federal courts, Illinois courts21st and 22nd editions

An agreement with no single signing day carries another date in the date slot, and the phrase saying which date it is goes in italics so a reader can tell the two apart.¹

1. 1R. 21.4.4 Date of Signing. Tables: B2 Typeface for Court Documents.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.