Related sobre Nazir 3:1

There is no difference between a generic nazir [i.e., one who did not specify a time frame and defaults to thirty day period] and a thirty day nazir [i.e., one who explicitly specified a thirty day period] except that a generic nazir shaves on the thirty first day, and if he shaved on the thirtieth, his vow was not fulfilled, whereas the thirty day nazir shaves on the thirty first day and if he shaved on the thirtieth, his vow is fulfilled. For both of them, the ideal is to shave on the thirty first day. There is no difference between the blood of a corpse and a mixture of blood from a live person and from a dead person except that the blood of a corpse causes a nazir to shave [i.e., breaks the nazirite vow] and one is liable for contaminating the temple and holy things, whereas the blood mixture does not cause a nazir to shave and one is not liable for contaminating the temple and holy things.

Rabbi Joshua and Rabbi Yakim, a man of Hadar, testified concerning a jar of ashes of a red heifer which was put over a creeping thing, that they were unclean. Whereas Rabbi Eliezer had pronounced them clean. Rabbi Papias testified concerning one who had vowed two naziriteships, that if he cut his hair after the first one on the thirtieth day, he could cut his hair after the second one on the sixtieth day; and if he cut his hair on the fifty-ninth day he has also fulfilled his duty, for the thirtieth day counts towards the required number.