I'm a gentile and have studied Nedarim 61 a little bit recently. From what I've gathered so far, when someone makes a neder for "this year" or "a year", it means for the rest of the year, whether that year ends up being a leap year or not. But if he makes it for "one year" it means 12 months from the day he made that neder.
If I'm correct on this, what would be the time period if he made the neder for "two years" or "10 years"? How would the time period be determined?
