te-therefore; ete-all these (descriptions of astronomical calculations); sreyasah-of auspiciousness; kalah-times; nrnam-for human beings; sreyah-auspiciousness; vivardhanah-increase; kuryat-one should perform; sarva-atmana-by other activities (not only the sraddha ceremony); etesu-in these (seasons); sreyah-(causing) auspiciousness; amogham-and success; tat-of a human being; ayusah-of the duration of life.