This is the 12292nd most frequent Spanish word.
lectivo
Pertaining to school days or periods when classes are held.
In this sentence, 'lectivos' is used to describe the days allocated for teaching or classes to occur, distinguishing them from non-teaching days such as weekends or holidays.
El calendario escolar tiene 200 días lectivos.
The school calendar has 200 school days.
Here, 'lectivo' is again used to specify a day dedicated to learning or teaching, but in a negative context to indicate its absence.
Hoy es un día no lectivo debido a la festividad regional.
Today is a non-school day due to the regional holiday.
This depicts 'lectivos' as modifying the final days of a term that are still designated for academic purposes.