x1 (event/state) is in the fifteenth month of a year x2 in system x3.
lo masnvai = lo se ma'irdetri be li vai. See also detri, detke'u, masti; masnpa, masnre, masnci, masnvo, masnmu, masnxa, masnze, masnbi, masnso, masndau, masnfei, masngai, masnjau, masnrei or masnxei.