The 1999 calendar has the same connection between dates and days of the week as the 2010, 2021 and 2027 calendars.
In 2021.
Since 1976, it only repeated in 2004 and will next repeat in 2032. It was a leap year and leap year calendars generally repeat every 28 years.
As 1964 was a leap year, it does not repeat very often. It repeated in 1992 and in the rest of this century it will only repeat in 2020, 2048 and 2076.
That will happen in the year 2030.
2014
The 2004 calendar will repeat itself in 2032.
The year 1999 will repeat in 2028.
2019
The year 2000 will repeat in 2028.
The 2010 calendar repeated in 2021 and will next repeat in the year 2027.
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 calendar for the year 2002 will repeat itself in the year 2013, as they share the same pattern of days and dates. This is because the Gregorian calendar repeats every 11 years for the same year. Therefore, you can expect the calendar for 2002 to align with the calendar for 2013 in terms of days of the week corresponding to specific dates.
The 1971 Gregorian calendar repeated in 1982
1999 was not a leap year so it will not be repeated during the years 2016, 2020, 2024, 2028, 2032, 2036, nor 2040. That leaves 23 years that it can repeat 100%. The 1999 calendar started on a Friday. So, what years start on a Friday that are not any of the above years?
The next time the calendar year 2005 repeated itself was in 2011. As of 2018, the next time that it will repeat again is in 2022.