You Can Reuse These Vintage Calendars in 2019
by Beth Skwarecki from Lifehacker on (#48K9B)
There are only 14 possible ways to arrange a calendar: the year either has 365 days or 366, and it starts on one of the seven days of the week. That means calendars repeat: in 2019 you can use a calendar from 2013, which also had 365 days and started on a Tuesday.