Hello all:
Do you know how we say 閏年 in English? Thanks!

leap year

Or technically "intercalary year".

Tim

Also, bissextile year.

The following is from Your Dictionary's Word of The Day for February 28.

Tim

Bissextile (adjective)

Pronunciation: [bI-'seks-tIL]

Definition: The discussion of same sex marriages made us think that we should send out a related word but we decided instead to offer this wholly unrelated word, which means "(1) referring to a leap year or (2) the extra day in a leap year."

Usage: Gotcha! Today's word has absolutely nothing to do with gender differences. As you can see from the Etymology, it refers only to leap year or the intercalary (extra) day of a leap year. If you are in a hurry, you may refer to the extra day simply as the "bissext," though "bissextus" is probably the more easily pronounced.

Suggested Usage: For those of you born on February 29, here is something you can't get away with, "The reason Gilliam is 10 but looks 40 is that he was born in a bissextile year and only has birthdays every 4 years." That simply doesn't work, however logical it might seem. 2004 has a bissectus (yesterday) and hence is a bissextile year.

Etymology: This word comes from Latin bissextilis "having an intercalary day" from the first word of the phrase bis sextus (dies) "twice the sixth day," from bis "twice" and sextus "sixth." The phrase arises from the fact that the sixth day before the Calends of March (February 24} occurred twice every leap year in the Roman calendar. Thus this "sex" comes from the Latin word for "six," which shares the same origin as German "sechs," Dutch "zes," Spanish "seis," French "six," Italian "sei," Russian "shest'," and Classical Greek "hex" (remember "semi-" and "hemi-"?) Many words come from the Latin and Greek versions of this root: "sextet," "sextillion," and "hexagonal." "Siesta" was inherited by Spanish from the Romans, by whose timepieces midday was 6 o'sundial.
–Dr. Language, YourDictionary.com