Hitherto we have observed the division of the month into small and the smallest phases of the moon, in which three or at most four days have the same name, and are numbered in order that they may be distinguished. Other peoples count the days beginning at the principal moon-phases. The Central Eskimos can determine the days of the month very accurately from the age of the moon[699], the terms are unfortunately not given. So also for the Kaigan of N. W. America names of the nights reckoned from the phases of the moon are quoted; unfortunately only very confused and inaccurate information could be obtained, and only 14 names are given:--1, new moon; 2, ‘second sleep’, etc., up to 9, full moon or ‘great moon’, the third night after which is ‘the first night after the full moon’[700]. For the inhabitants of southern Formosa the bare and therefore almost useless statement is made that they reckon according to the age of the moon[701]. Of the Wagogo of what was formerly German East Africa we are told that the phases of the moon and the numbers of the nights serve as more accurate determinations of time. For instance, the third night after the next appearance of the moon will be the day following the third night after the moon’s appearance, and therefore the fourth of a month, since the crescent is visible exactly on the first day of a month[702]. Unfortunately we are not told what phases, other than the new moon, serve as starting-points for the reckoning. The same remark applies to an account for Sumatra. The Central Sumatran Expedition has proved that names for days of the week and for months are unknown among the Rawa and the Djambi Kubu of Djipati Mando. The people count by the phases of the moon, and say e. g. the 1st, 2nd, 3rd day of the moon[703].