Most genealogy programs support Marriage Banns facts. In GEDCOM it is the MARB tag, associated with a date and a place.
Banns were a:
Proclamation or public notice given in church of an intended marriage, in order that those who know of any impediment thereto may have opportunity of lodging objections.
In England, banns were usually published on three consecutive Sundays. Do you enter three identically sourced facts with just a different day, or do you just create one fact for the event?
Neither way is ideal. In the first method, it seems very redundant and not particularly useful to have three nearly identical facts. In the second method when using only one fact, which date of the three do you decide to enter?
What are the best practices for handling marriage banns events in genealogy databases?