Double Residency with 183 day Rule? – Trick Question

Hypothetically, its possible for a person to be resident in two countries that both define residency requirements as maintaining presence in each country for 183 days during a year.

Every 4 years, during a leap year, the year is 366 days long. During a leap year, its possible to be present in 2 different countries for 183 days. Expect to have fun with your taxes during a leap year!