This is the calendar for any common year starting on Friday, January 1 (dominical letter C). Examples: Gregorian years 1993, 1999, 2010, 2021 and 2100 or Julian years 1910 and 1899 (see bottom tables). A common year is a year with 365 days, i.e., not a leap year. Previous year (common) Next year (Common) Previous year (leap) Next year (leap) This is the only year type where the nth "Doomsday" (this year Sunday) is not in ISO week n; it is in ISO week n-1.