A day for sandwiches

There are many different anniversaries on November 3rd annually. Among them, "Sandwich Day". The reason that sandwich day is November 3rd is twofold. The first reason is the pun on the date; eleven (11, as in the 11th month, November) can be read as "ii" and three (3) as "san", adding the "do" gives ii sando. "Ii sando" means good sandwich.

The second reason is that the date is, according to some sources, the birthday of John Montagu (1718-1792), 4th Earl of Sandwich, a British aristocrat for whom the sandwich is said to be named.  However, while some sources, such as Kotobank, state that John Montagu's birthday was November 3rd, the current Wikipedia page lists his date of birth as November 13th, 1718.

You will find some sandwich ideas in the Q&A section of City-cost were sandwiches have been discussed recently. Why not share with us your favorite type of sandwich in Japan on that forum too. Or you can share it as a comment on this post if you prefer.