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