The short answer: Both “Venetian Hour” and “Viennese Hour” are used for the big dessert-buffet portion of a wedding or other social event. Cambridge Dictionary lists Viennese hour as a synonym for Venetian hour. The exact history of the names is less certain than wedding venues sometimes make it sound.

What Is a Venetian Hour?
It is the moment late in a wedding when somebody apparently looks at the cake and says, “This seems insufficient. Release the rest of the sugar.”
A Venetian Hour is a large dessert buffet, usually appearing after dinner and often after the wedding cake. Depending on the venue, that can mean pastries, cakes, cookies, ice cream, coffee stations, chocolate fountains and whatever else can make formalwear feel tighter.
Is a Viennese Hour the Same Thing?
Basically, yes.
Cambridge Dictionary defines Venetian Hour as a dessert-buffet portion of a wedding or social event and lists Viennese Hour as a synonym.
Some people use “Viennese” for a more formal version and “Venetian” for a more playful spread, but that is not a universal rule requiring Austrian pastries on one side and Italian cookies on the other.
So Why Are There Two Names?
This is where the old article became much more confident than the evidence deserved.
You will hear stories involving Vienna’s pastry tradition, Venice, Italian-American weddings, postwar name changes and even Burano glassblowers.
The problem is that the exact origin of the competing names is uncertain. Cambridge itself notes that uncertainty while connecting the terms broadly to Italian and Austrian sweet traditions.
When the history is fuzzy, the correct editorial move is not to select the most decorative theory and promote it to fact.
Which Term Should You Use?
Use the one your venue, family or region uses.
In the New York wedding world, you may hear both. The practical meaning is the same: dinner is over, but apparently dessert has declared a second reception.
The Important Part Is the Dessert
Nobody has ever stood in front of forty pastries and said, “I refuse to participate until we settle the Venetian-versus-Viennese etymology.”
Both terms work. The historical origin is not perfectly settled.
Have a cannoli and move on.
