The Gregorian calendar is a relatively recent invention, and it's pretty far removed from how we originally tracked our days and seasons. Up until 1582, most cultures known to us relied on a 13-moon ...

DEAR ABBY: I enjoyed the column you published Nov. 26 with letters from readers about 13-13-13, and I’m not the least astonished that many of them didn’t get the humor. You failed to point out that ...

Meeting in Manhattan last week, U. S. paper makers vigorously endorsed the often-proposed 13-month calendar with 28-day months and an extra summer month, Sol. “Inconsistencies” in the present calendar ...