a month in the Gregorian calendar

the day designated for inauguration of the United States President

the solar calendar now in general use, introduced by Gregory XIII in 1582 to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752

the first day of the year

observed on the Monday closest to January 15

the New Year in Vietnam; observed for three days after the first full moon after January 20th

the day designated for inauguration of the United States President

the solar calendar now in general use, introduced by Gregory XIII in 1582 to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752

the first day of the year

observed on the Monday closest to January 15

the New Year in Vietnam; observed for three days after the first full moon after January 20th