Leap years tell how frequently this change occurs. If all years were 364 days this will never be an issue since there will not be an extra day. When a year is

Leap years tell how frequently this change occurs. If all years were 364 days this will never be an issue since there will not be an extra day. When a year is 365 days there is an extra day and the next years calendar starts on a day adjacent to previous year. Note that I am talking about calendar year not fiscal year. So if all years were leap years, calendar would get in balance after 7 years and after adjusting for 1 week in the fiscal year. But not all years are 365 days so sometimes the calendar shifts by 1 day and sometimes by 2 days. So whether the calendar gets into balance varies depending on where the leap year are with respect to when the calendar is adjusted. As my parent comment said, the last adjustment was in 23, it is not easy to say whether the next adjustment will be after 5 years or 6 years without looking at how many days get added year by year. It will definitely not be 7 years. For arguments sake, adjust the fiscal calendar in January 1st. If you did that in 2024, that right there is a leap year, so you gain / lose 2 days, then 1 day each in 25, 26, 27, and then 2 days in 2028. Net 7 days so you adjust calendar in 2029 - 5 years later. But now the calendar has started in 2029, so adjust 1 day in 29, 30, and 31, even 2 days in 32, even 1 each in 33 and 34. So you adjust after 6 years. There are more options too but not worth analyzing each.