Why can't I buy egg-nog all year 'round?

I would love to be able to buy eggnog all year round, but it's
perishable, and apparently most merchants find that sales are not good
enough after the holiday season to make it economically feasible to
offer it. Here's a sensible answer from a dairy:

"Why not make Eggnog year-round?
 
Experience has shown us that Eggnog sales drop off to nearly nothing
immediately after the New Year holiday. The bright side is that
ultra-pasteurization allows us to put a 90-120 day code on our product
without loss of flavor or quality. This allows retailers to order
ahead and carry the product well into the new year if they so choose,
and if inventories allow."

Smith Dairy
http://www.smithdairy.com/smiths/pages/FAQ-Detail.cfm?ID=67

"Ask Yahoo" evades the question, but provides a history of eggnog:

Ask Yahoo: Why is eggnog only sold around Christmas?
http://ask.yahoo.com/ask/20021225.html

More nog lore:

CNN: Eggnog -- a Renaissance-era comfort food
http://www.cnn.com/2000/FOOD/news/11/21/eggnog/

In Depth Info: Eggnog Index
http://www.indepthinfo.com/eggnog/index.shtml

I have tried canned eggnog, which can be purchased year-round at some
stores. It isn't bad, but it resembles fresh eggnog in the same way
that canned milk resembles fresh milk. In my area of the US, a canned
eggnog is available under the Borden brand:

Borden EggNog
http://www.bordeneggnog.com/

The Borden product can now be purchased online:

Borden EggNog: Purchase
http://www.bordeneggnog.com/purchase.asp

Here's an interesting history of eggnog that includes some recipes for
making your own:

Jerusalem Post
http://www.jpost.com/Editions/2001/12/20/Food/Recipes.40329.html

Eggnog for dieters! What a concept:

eDietShop: Calorie Control Egg Nog Mix
http://www.edietshop.com/onlinestore/item.asp?ITEM_ID=175

Google search strategy:

Google Web Search: "eggnog year-round"
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=%22eggnog+year-round

Thanks for a fun question! Please request clarification if needed.

Happy holidays,
pinkfreud

Great stuff, thanks!