Calendar

culture-tradition

Friday the 13th occurs when the thirteenth day of a month falls on a Friday. This date is widely recognized in Western cultures as unlucky, shaping behavior, customs, and popula...

reference

A "straight month" is not a formal calendar term. People sometimes use it to mean a month that is exactly four weeks (28 days), or simply a month without unusual features like a...

Celebrity Profiles

Leap year arrives every four years to correct our calendars by adding one extra day: February 29. This brief overview explains why that day exists, how the rule keeps calendars...

lifestyle

To answer how many days until Spring 2018, you first need to define which spring you mean. Astronomical spring in 2018 began on the vernal equinox, which occurred on March 20, 2...

reference

June 14 is a date that appears annually on calendars worldwide, marking the 165th day of the Gregorian year (166th in leap years). On this date, the sum of the month and day equ...

superstition

Friday the 13th is a date alignment that occurs when the thirteenth day of a month falls on a Friday. This combination is widely associated with bad luck and is embedded in folk...

Calendar & Time

The count of Friday the 13th in any year depends on how the days of the week align with the month starts. Each month begins on a specific weekday, and when that start day is a S...

reference

The first day of spring in 2018 was Saturday, March 20. This date marks the March equinox in the astronomical calendar for the Northern Hemisphere. In this evergreen explainer,...

reference

Friday the 13th occurs when the 13th day of a month lands on a Friday. Because the Gregorian calendar repeats in cycles, the pattern of weekdays for any given date follows predi...