Does anone know a term specific to the afternoon?
I couldn't find one, but as matutinal < Latin matutinalis < matutinus < Matuta 'goddess of the dawn', vespertine < vesper 'evening', diurnal < diurnalis < dies 'day', nocturnal < nocturnalis < nox, noctis, 'night', crepuscular < crepusculum 'dusk, twilight' < creper 'dusky, dark'. The Latin word for afternoon is pomeridianus or postmeridianus. So, how about pomeridianalar? (Also, the Latin word for afternoon meal is merenda. Maybe that could be used.)