Can FMLA be filed retroactively?

Does FMLA start from the beginning?

First day of FMLA leave calculation method. The next 12-month period would begin the first time FMLA leave is taken after completion of any previous 12-month period. As an example, if the employee begins FMLA leave on June 1, 2019, then the next 12-week period would begin again on June 1, 2020.5 ago 2019

Is FMLA based on a calendar year?

An employee's 12-week FMLA leave can be calculated using the calendar year, any fixed 12-month year, the first day of FMLA leave or a rolling period.5 ago 2019