The most popular form of astrological belief in this period was to regard certain periods of time as lucky or unlucky. For example, Rabbi Yehoshua ben Levi listed the character traits associated with one's having been born on specific days of the week; R' Hanina dissented and said that character traits are determined by the planet under whose influence one was born. An announcement is found to the effect that it is dangerous to drink water on Tuesday and Friday evenings. Samuel of Nehardea, a physician and astrologer, taught that it was dangerous to bleed a patient on Tuesday (as well as on Monday or Thursday for a different reason), because Mars reigns at the midheaven. The new moon was likewise regarded as an unfavorable season for bleeding, as were also the third of the month and the day preceding a festival.