QotD: This Is My Holiday

If you could create your own National Holiday, what would it be and when? 
Submitted by John M.

Well, golly.  How could I miss this one?  As many of you already know, I am already trying to pioneer my first National Holiday, Hookermas, which has nothing at all to do with prostitution.  However, I was recently thinking to myself how much I would also like to observe Irving R. Feldman's Birthday.  According to Murray Burns (of Herb Gardner's A Thousand Clowns):

Irving R. Feldman's Birthday is my own personal national holiday.  I did not open it up for the public. He is proprietor of perhaps the most distinguished kosher delicatessen in this neighborhood and as such I hold the day of his birth in reverence.

Naturally, this begs several questions:

• If the holiday is not open to the public, should I celebrate it or should I celebrate something like it?
• How do you celebrate the birthday of a fictional character?  More importantly, how do you decide when it it?
• Should I, instead, pick the birthday of the proprietor of my favorite local eatery to hold in reverence?
• Should I just make up a day, make up a reason, and take the day off?