If you have to do something within one year of a certain date, does the one year period end on exactly the same date next year? For example, let's say you were given a warning or put on probation for one year. Or you have to do something within a year. Or you have to make restitution of funds within a year. You can't be caught with a DUI within a year. Etc.
For example, my employer allows you to take a year off without pay and return to work within exactly a year to whatever open position they have. If you leave on 7/20/2019 what would be an exact year from then? 7/19/2020 or 7/20/2020. Let's say you also get out of work at 4pm does that mean you have until 4pm a year from now to return.
I left my job on May 4, 2019 and returned to the same position on May 3, 2020. I rushed to fly back to the US just to go to Human Resources on that day to sign reinstatement forms. When I mentioned how expensive the flight was and that if I could have come back the next day it would have been cheaper, I was told I actually had one more day. But I didn't want to take any chances.
In Science a year is actually 365 and 6 hours. A calendar year is exactly 365 days. A leap year is 366 days. Do you take any of this into consideration when calculating a year for legal purposes? Can an employer, during leap year, insist that a year is 365 days and not 366? Can they say you signed your leave paperwork at 4:15pm but now it's a year later and it's 4:16pm so you can't come back?