The year 1999 will repeat in 2028.
In 2021.
The 1954 calendar repeated in 1965, 1971, 1982, 1993, 1999, and 2010. It will next repeat in 2021.
1954 Calendar repeats at 1965 .
The 1971 Gregorian calendar repeated in 1982
The 1999 calendar has the same connection between dates and days of the week as the 2010, 2021 and 2027 calendars.
The 2015 calendar will repeat in 2026.
The 2000 calendar will repeat in 2028.
The 2015 calendar will repeat in 2026.
The 2004 calendar will repeat itself in 2032.
The 2009 calendar will repeat in 2015.
The 2008 calendar will repeat in 2036. Calendar patterns repeat every 28 years because of the cycle of leap years.
The 2013 calendar repeated in 2019 and will next repeat in 2030.