You can use your 1999 calendar again in the year 2010. This is because both years start on the same day of the week and have the same leap year status. The cycle of calendars typically repeats every 28 years, though there can be exceptions.
The year 1999 will repeat in 2028.
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.
1955 was a common year starting on a Saturday. As of 2011, the next time this year will happen is in 2022.
The calendar year 1999 will repeat in 2025. This is because both years start on the same day of the week and have the same leap year pattern. The next occurrence after 2025 will be in 2036.
A 2008 calendar can be used again in the years that have the same pattern of days as 2008. This occurs every 11 years, as long as the year is not a leap year. Therefore, the next year that has the same calendar pattern as 2008 will be 2019, and then again in 2030, 2041, and so on.
2010 is a common year starting on a Friday. The next such year will be 2021.
1965 was a common year starting on a Friday. As of 2018, the next time you can use a 1965 calendar is in 2021.
That will happen in the year 2030.
2008 was a leap year starting on Tuesday. The next time such a calendar can be used again is in 2036.
The year 1968 was a leap year starting on Monday. As of 2010, the next three occasions in which you can use this calendar are 2024, 2052, and 2080.
You can next correctly use your 1993 calendar in the year 2004. This is because both years start on the same day of the week and have the same leap year pattern. After 2004, the next times you can use the 1993 calendar again will be in 2015 and 2021.
2001 was a common year starting on a Monday. The current year, 2018, is the same. After 2018, the next time the 2001 calendar can be reused is in 2029.