On January 1, 1873, Japan adopted the Gregorian calendar. Before 1873, the Chinese style lunisolar calendar had been in use since 7th century.Japanese eras are still in use.

Japan has refused to accept some elements of the Gregorian calendar itself. The present Japanese Solar calendar does not include following events:

The Northward equinox is a national holiday in Japan and an important religious holiday in both Japanese Buddhism and Shinto but is determined completely using astronomy. The date is not fixed but is announced by National Astronomical Observatory of Japan every year.

Sunday and Saturday are regarded as "Western style take-a-rest days". Many Japanese retailers do not close on Saturdays or Sundays, because many office workers and their families are expected to visit the shops during the weekend. An old Japanese imperial navy song says "We have neither Sundays nor Saturdays!" which means "We work throughout the week."

Leap years in the Japanese solar calendar have been legally determined based on kōki since 1899, however this law sets the number "kōki-660" to be the base of calculation, so leap years in Japanese solar calendar are aligned with that of the Gregorian calendar.

Kim Hyun Joong (Hangul: 김현중, Hanja: 金賢重) was born on 6 June 1986. He is a South Korean entertainer and the leader of boyband SS501. Kim is well-known for his role as Yoon Ji Hoo in the 2009 Korean drama Boys Over Flowers, winning Best Actor Award at the Seoul International Drama Awards 2009, and Popularity Award at the 45th PaekSang Arts Awards. He is also known for playing in the late 2010 Korean drama Playful Kiss, as Baek Seung Jo. He is a style icon in Korea, winning several icon awards.

He dropped out of school when he decided to become a singer. During his school days, he played bass guitar in a band. During the years 2001 and 2002 when he was 14–15, while working as a waiter in a family restaurant, located at Jamsil-dong, he was introduced to a new set up management company CEO. Initially he was to debut in a 5 member group. Han Yeon of B2Y (now disbanded) was to be the Leader and Kim the maknae. While the group underwent training together, they were asked by their company to debut in China as a Hallyu project group, but the group rejected the offer and disbanded. Kim proceeded to audition for DSP Media (formerly DSP Entertainment) and became a member and leader of SS501. Kim returned to school and graduated in 2006 after debuting as a member of SS501. In 2011, he enrolled in Chungwoon University to study stage production management.